By my count there are currently 421 council vacancies in 414 wards, as follows:
(A) Vacancies in Scotland. Polling dates remain under the control of the Returning Officer (8 vacancies)
Argyll and Bute, Helensburgh and Lomond South (LD) - 18 March 2021 - (
past results)
Argyll and Bute, Isle of Bute (Ind) - 18 March 2021 - (
past results)
Glasgow, Baillieston (Lab) - 18 March 2021 - (
past results)
Glasgow, Partick East/Kelvindale (Ind elected as C) - 18 March 2021 - (
past results)
Midlothian, Midlothian East (SNP) - 25 March 2021 - (
past results)
Perth and Kinross, Almond and Earn (SNP) - 25 March 2021 - (
past results)
Renfrewshire, Paisley Southeast (Ind) - (
past results)
Stirling, Forth and Endrick (SNP) - (
past results)
(B) Vacancies in Wales, to be filled in the period 1 March 2021 to 6 May 2021 (17 vacancies)
Conwy, Eirias (Ind) - 18 March 2021 - (
past results)
Denbighshire, Corwen (PC) -
18 Feb 2021 18 March 2021 - (
past results)
Wrexham, Maesydre (Lab) - 18 March 2021 - (
past results)
Gwynedd, Llanrug (PC) - 25 March 2021 - (
past results)
Monmouthshire, St Kingsmark (C) - 1 April 2021 - (
past results)
Torfaen, Abersychan (Ind) - 8 April 2021 - (
past results)
Torfaen, Cwmyniscoy (Lab) - 8 April 2021 - (
past results)
Torfaen, New Inn (C) - 8 April 2021 - (
past results)
Isle of Anglesey, Caergybi (Ind) - 6 May 2021 - (
past results)
Isle of Anglesey, Seiriol (PC) - 6 May 2021 - (
past results)
Bridgend, Nant-y-moel (Ind) - (
past results)
Flintshire, Gwernymynydd (Ind) - (
past results)
Neath Port Talbot, Aberavon (Lab) - (
past results)
Newport, Victoria (Lab) - (
past results)
Rhondda Cynon Taf, Llantwit Fardre (Ind elected as C) - (
past results)
Rhondda Cynon Taf, Penrhiwceiber (Cynon Valley Party) - (
past results)
Swansea, Castle (Lab) - (
past results)
(C) Vacancies in England for terms not ending May 2021, to be filled as standalone by-elections on 6 May 2021 (199 vacancies in 194 wards)
Allerdale, Aspatria (C elected as Putting Cumbria First) - (
past results)
Allerdale, Christchurch (Lab) - (
past results)
Allerdale, Ellen and Gilcrux (Lab) - (
past results)
Allerdale, St John's (Ind) - (
past results)
Allerdale, Seaton and Northside (C) - (
past results)
Arun, Brookfield (LD) - (
past results)
Arun, Pevensey (LD) - (
past results)
Ashfield, Skegby (Zadroznyite) - (
past results)
Ashford, Beaver (Lab) - (
past results)
Barking and Dagenham, Thames (Lab) - (
past results)
Barnet, Edgware (C) - (
past results)
Barrow-in-Furness, Hindpool (Lab) - (
past results)
Barrow-in-Furness, Roosecote (C) - (
past results)
Bassetlaw, Ranskill (Lab) - (
past results)
Bassetlaw, Tuxford and Trent (C) - (
past results)
Birmingham, Hall Green North (Lab) - (
past results)
Birmingham, Billesley (Lab) - (
past results)
Birmingham, Oscott (Lab) - (
past results)
Birmingham, Quinton (Lab) - (
past results)
Blaby, Stanton and Flamville (C) - (
past results)
Blackpool, Highfield (C) - (
past results)
Blackpool, Norbreck (Ind) - (
past results)
Bolsover, Bolsover North and Shuttlewood (Lab) - (
past results)
Bolsover, Pinxton (Ind) - (
past results)
Boston, Skirbeck (2) (C/Ind elected as C) - (
past results)
Bournemouth Christchurch and Poole, Canford Heath (LD) - (
past results)
Bournemouth Christchurch and Poole, Commons (Ind) - (
past results)
Braintree, Witham South (C) - (
past results)
Brighton and Hove, Hollingdean and Stanmer (Lab) - (
past results)
Brighton and Hove, Patcham (C) - (
past results)
Broxtowe, Stapleford South West (Lab) - (
past results)
Canterbury, Swalecliffe (C) - (
past results)
Canterbury, Westgate (Lab) - (
past results)
Carlisle, Cathedral and Castle (Lab) (the Cursing Stone strikes again!) - (
past results)
Carlisle, Newtown and Morton North (Lab) - (
past results)
Chelmsford, Moulsham Lodge (LD) - (
past results)
Cheshire East, Crewe West (Lab) - (
past results)
Cheshire West and Chester, Frodsham (C) - (
past results)
Cheshire West and Chester, Neston (Lab) - (
past results)
Copeland, Whitehaven Central (Lab) - (
past results)
Craven, Barden Fell (Ind) - (
past results)
Craven, Penyghent (Lab) - (
past results)
Croydon, New Addington North (Ind elected as Lab) - (
past results)
Croydon, Woodside (Ind elected as Lab) - (
past results)
Cumbria CC, Brampton (C) - (
past results)
Cumbria CC, Cockermouth North (LD) - (
past results)
Cumbria CC, St John's and Great Clifton (Ind) - (
past results)
Cumbria CC, Ulverston West (C) - (
past results)
Dacorum, Leverstock Green (C) - (
past results)
Dacorum, Tring Central (LD) - (
past results)
Darlington, Red Hall and Lingfield (Lab) - (
past results)
Dartford, Darenth (C) - (
past results)
Dartford, Wilmington Sutton-at-Hone and Hawley (C) - (
past results)
Derbyshire Dales, Masson (Lab) - (
past results)
Derbyshire Dales, Wirksworth (Lab) - (
past results)
Dover, Mill Hill (Lab) - (
past results)
Ealing, Ealing Broadway (C) - (
past results)
Ealing, Hanger Hill (C) - (
past results)
Ealing, Hobbayne (Lab) - (
past results)
East Devon, Whimple and Rockbeare (Ind) - (
past results)
East Hampshire, Bramshott and Liphook (C) - (
past results)
East Hampshire, Grayshott (C) - (
past results)
East Lindsey, Chapel St Leonards (C) - (
past results)
East Riding, South West Holderness (C) - (
past results)
East Staffordshire, Eton Park (2) (Lab/Ind) - (
past results)
East Suffolk, Framlingham (C) - (
past results)
Eastbourne, Hampden Park (LD) - (
past results)
Eden, Hartside (Ind) - (
past results)
Eden, Skelton (C) - (
past results)
Enfield, Chase (Lab) - (
past results)
Enfield, Jubilee (Lab) - (
past results)
Enfield, Southbury (Lab) - (
past results)
Epping Forest, Waltham Abbey High Beach (C) - (
past results)
Fenland, Lattersey (C) - (
past results)
Forest of Dean, Berry Hill (Ind All) - (
past results)
Forest of Dean, Cinderford East (Lab) - (
past results)
Gravesham, Westcourt (Lab) - (
past results)
Greenwich, Glyndon (Lab) - (
past results)
Greenwich, Greenwich West (Lab) - (
past results)
Greenwich, Kidbrooke with Hornfair (Lab) - (
past results)
Greenwich, Shooters Hill (Lab) - (
past results)
Guildford, Friary and St Nicolas (LD) - (
past results)
Guildford, Pirbright (Ind elected as C) - (
past results)
Guildford, Send (Guildford Greenbelt Group) - (
past results)
Hackney, Hoxton East and Shoreditch (Lab) - (
past results)
Hackney, King's Park (Lab) - (
past results)
Hackney, Stamford Hill West (C) - (
past results)
Hackney, Woodberry Down (Lab) - (
past results)
Harborough, Market Harborough - Little Bowden (C) - (
past results)
Herefordshire, Newton Farm (Ind) - (
past results)
Hertsmere, Borehamwood Kenilworth (C) - (
past results)
Hertsmere, Bushey North (LD) - (
past results)
Hillingdon, Charville (C) - (
past results)
Horsham, Trafalgar (LD) - (
past results)
Hounslow, Cranford (Lab) - (
past results)
Hounslow, Hounslow Heath (Lab) - (
past results)
Huntingdonshire, St Ives East (C) - (
past results)
Huntingdonshire, Warboys (C) - (
past results)
Islington, Holloway (Lab) - (
past results)
Kingston upon Thames, Chessington South (LD) - (
past results)
Lancaster, Kellet (LD) - (
past results)
Leicester, North Evington (Lab) - (
past results)
Lewes, Seaford East (C) - (
past results)
Lewes, Seaford West (C) - (
past results)
Lewisham, Bellingham (Lab) - (
past results)
Lewisham, Catford South (Lab) - (
past results)
Lewisham, New Cross (Lab) - (
past results)
Lewisham, Sydenham (Lab) - (
past results)
Lichfield, Summerfield and All SS (Lab) - (
past results)
Luton, High Town (Lab) - (
past results)
Luton, Round Green (Lab) - (
past results)
Maidstone, Detling and Thurnham (LD elected as C) - (
past results)
Maldon, Heybridge East (C) - (
past results)
Maldon, Tollesbury (C) - (
past results)
Merton, St Helier (Lab) - (
past results)
Mid Devon, Castle (LD) - (
past results)
Mid Devon, Taw (C) - (
past results)
Mid Devon, Westexe (Ind) - (
past results)
Mid Sussex, Copthorne and Worth (Ind) - (
past results)
Newark and Sherwood, Boughton (C) - (
past results)
Newham, East Ham Central (Lab) - (
past results)
North Hertfordshire, Royston Palace (C) - (
past results)
North Kesteven, Bassingham and Brant Broughton (Lincs Ind) - (
past results)
North Lincolnshire, Ashby (Lab) - (
past results)
North Lincolnshire, Bottesford (C) - (
past results)
North Lincolnshire, Broughton and Appleby (2) (C) - (
past results)
North Norfolk, Holt (C) - (
past results)
North Somerset, Portishead East (Ind) - (
past results)
North Warwickshire, Atherstone Central (Lab) - (
past results)
North Warwickshire, Curdworth (C) - (
past results)
North West Leicestershire, Ibstock East (C elected as Lab) - (
past results)
North West Leicestershire, Worthington and Breedon (C) - (
past results)
North Yorkshire CC, Harrogate Bilton and Nidd Gorge (LD) - (
past results)
North Yorkshire CC, Ribblesdale (C) - (
past results)
Redbridge, Loxford (Lab) - (
past results)
Redbridge, Seven Kings (Lab) - (
past results)
Redcar and Cleveland, Guisborough (C) - (
past results)
Redcar and Cleveland, Longbeck (C) - (
past results)
Ribble Valley, Billington and Langho (C) - (
past results)
Ribble Valley, Mellor (C) - (
past results)
Richmond upon Thames, Hampton Wick (Grn) - (
past results)
Rossendale, Stacksteads (Ind) - (
past results)
Rushcliffe, Sutton Bonington (C) - (
past results)
Sevenoaks, Brasted Chevening and Sundridge (C) - (
past results)
Somerset West and Taunton, Trull Pitminster and Corfe (LD) - (
past results)
South Cambridgeshire, Harston and Comberton (LD) - (
past results)
South Cambridgeshire, Melbourn (LD) - (
past results)
South Derbyshire, Church Gresley (C) - (
past results)
South Derbyshire, Hilton (2) (C) - (
past results)
South Derbyshire, Seales (C) - (
past results)
South Gloucestershire, Frenchay and Downend (C) - (
past results)
South Hams, Ivybridge West (C) - (
past results)
South Kesteven, Glen (C) - (
past results)
South Lakeland, Broughton and Coniston (C) - (
past results)
South Lakeland, Furness Peninsula (C) - (
past results)
South Lakeland, Grange (LD) - (
past results)
South Lakeland, Kendal Rural (LD) - (
past results)
South Oxfordshire, Didcot North East (Ind) - (
past results)
South Ribble, Longton and Hutton West (C) - (
past results)
South Ribble, St Ambrose (Lab) - (
past results)
Spelthorne, Staines South (Ind elected as LD) - (
past results)
Staffordshire Moorlands, Cheadle North East (Ind) - (
past results)
Staffordshire Moorlands, Cheadle South East (Ind) - (
past results)
Stockton-on-Tees, Billingham West (Ind) - (
past results)
Stockton-on-Tees, Bishopsgarth and Elm Tree (LD) - (
past results)
Stockton-on-Tees, Western Parishes (C) - (
past results)
Stoke-on-Trent, Moorcroft (Lab) - (
past results)
Surrey Heath, Bagshot (LD) - (
past results)
Swale, Sheerness (Lab) - (
past results)
Tandridge, Felbridge (C) - (
past results)
Telford and Wrekin, Dawley and Aqueduct (Lab) - (
past results)
Telford and Wrekin, Donnington (Lab) - (
past results)
Tendring, Eastcliff (Holland-on-Sea and Eastcliff Matters) - (
past results)
Tendring, West Clacton and Jaywick Sands (UKIP) - (
past results)
Test Valley, Andover Millway (Andover All) - (
past results)
Test Valley, Andover St Mary's (Andover All) - (
past results)
Test Valley, Chilworth Nursling and Rownhams (2) (C) - (
past results)
Tewkesbury, Cleeve Hill (C) - (
past results)
Thanet, Central Harbour (Lab) - (
past results)
Thanet, Dane Valley (Thanet Ind) - (
past results)
Thanet, Newington (Lab) - (
past results)
Torbay, Clifton with Maidenway (LD) - (
past results)
Uttlesford, Newport (Grn elected as Residents for Uttlesford) - (
past results)
Uttlesford, The Sampfords (Residents for Uttlesford) - (
past results)
Vale of White Horse, Grove North (Ind elected as LD) - (
past results)
Waltham Forest, Hatch Lane (C) - (
past results)
Wealden, Hailsham South (C) - (
past results)
Wealden, Heathfield North (C) - (
past results)
Wealden, Heathfield South (C) - (
past results)
West Lindsey, Kelsey Wold (C) - (
past results)
West Suffolk, Clare Hundon and Kedington (Ind) - (
past results)
West Suffolk, Lakenheath (Ind) - (
past results)
West Suffolk, Moreton Hall (C elected as Ind) - (
past results)
Wychavon, Elmley Castle and Somerville (C) - (
past results)
(D) Vacancies in England for terms not ending May 2021, to be filled as double vacancy on 6 May 2021 (66 vacancies)
Adur, Churchill (C) - (
past results)
Amber Valley, Somercotes (Lab) - (
past results)
Basildon, Langdon Hills (Ind) - (
past results)
Bolton, Astley Bridge (C) - (
past results)
Bradford, Bingley Rural (C) - (
past results)
Bradford, Keighley Central (Lab) - (
past results)
Calderdale, Greetland and Stainland (LD) - (
past results)
Castle Point, St George's (C) - (
past results)
Colchester, Prettygate (C) - (
past results)
Coventry, Wyken (Lab) - (
past results)
Crawley, Ifield (Lab) - (
past results)
Derby, Darley (Lab) - (
past results)
Exeter, Mincinglake and Whipton (Lab) - (
past results)
Gateshead, Birtley (Lab) - (
past results)
Harlow, Church Langley (C) - (
past results)
Harlow, Toddbrook (Lab) - (
past results)
Hart, Crookham West and Ewshot (Community Campaign Hart) - (
past results)
Ipswich, Castle Hill (C) - (
past results)
Ipswich, Holywells (Lab) - (
past results)
Kirklees, Birstall and Birkenshaw (C) - (
past results)
Knowsley, Halewood South (Ind) - (
past results)
Knowsley, St Gabriels (Lab) - (
past results)
Liverpool, Croxteth (Lab) - (
past results)
Manchester, Brooklands (Lab) - (
past results)
Manchester, Clayton and Openshaw (Ind) - (
past results)
Milton Keynes, Central Milton Keynes (Lab) - (
past results)
Milton Keynes, Woughton and Fishermead (Lab) - (
past results)
Newcastle upon Tyne, Byker (Lab) - (
past results)
North East Lincolnshire, East Marsh (LD) - (
past results)
North East Lincolnshire, Scartho (LD) - (
past results)
North Tyneside, Chirton (Lab) - (
past results)
North Tyneside, Preston (Lab) - (
past results)
North Tyneside, St Mary's (C) - (
past results)
Peterborough, Fletton and Woodston (C) - (
past results)
Reigate and Banstead, Earlswood and Whitebushes (in respect of Hal Brown, Grn) - (
past results)
Reigate and Banstead, Hooley Merstham and Netherne (C) - (
past results)
Reigate and Banstead, Horley East and Salfords (C) - (
past results)
Rochford, Hockley and Ashingdon (C) - (
past results)
Rochford, Hullbridge (Grn) - (
past results)
Rushmoor, North Town (Lab) - (
past results)
St Helens, Earlestown (Lab) - (
past results)
Sandwell, Old Warley (in respect of Steve Trow, Lab) - (
past results)
Sandwell, Rowley (Lab) - (
past results)
Sandwell, Wednesbury South (Lab) - (
past results)
Sefton, Blundellsands (Lab) - (
past results)
Sefton, Derby (Lab) - (
past results)
Sheffield, Richmond (Lab) - (
past results)
Solihull, Elmdon (LD) - (
past results)
South Tyneside, Horsley Hill (Lab) - (
past results)
South Tyneside, Monkton (Lab) - (
past results)
Southend-on-Sea, St Luke's (Ind) - (
past results)
Southend-on-Sea, Westborough (Lab) - (
past results)
Stevenage, Roebuck (Lab) - (
past results)
Sunderland, Copt Hill (Lab) - (
past results)
Sunderland, Shiney Row (Lab) - (
past results)
Sunderland, Washington South (Grn) - (
past results)
Tandridge, Queens Park (LD) - (
past results)
Tandridge, Valley (LD) - (
past results)
Trafford, Longford (Lab) - (
past results)
Trafford, Priory (Lab) - (
past results)
Wakefield, Airedale and Ferry Fryston (Ind) - (
past results)
Wigan, Orrell (C) - (
past results)
Winchester, St Michael (LD) - (
past results)
Wirral, New Brighton (Lab) - (
past results)
Wolverhampton, Heath Town (Lab) - (
past results)
Wolverhampton, Tettenhall Wightwick (C) - (
past results)
(E) Vacancies in England for terms ending May 2021 (April 2021 in Northamptonshire), to be left unfilled (131 vacancies)
Adur, Eastbrook (Lab)
Adur, Peverel (C)
Amber Valley, Heage and Ambergate (C)
Amber Valley, Kilburn Denby and Holbrook (C)
Barnsley, Central (Lab)
Basingstoke and Deane, Kempshott (C)
Blackburrn with Darrwen, Ewood (Lab)
Blackburrn with Darrwen, Livesey with Pleasington (C)
Bolton, Westhoughton North and Chew Moor (C)
Brentwood, Hutton Central (C)
Bristol, Brislington West (Lab)
Bristol, Central (Lab)
Bristol, Clifton Down (Grn)
Cambridge, King's Hedges (Lab)
Cambridge, Newnham (LD)
Cambridge, Queen Edith's (LD)
Cambridge, Trumpington (LD)
Cambridgeshire CC, Sawston and Shelford (C)
Cannock Chase, Hawks Green (C)
Cherwell, Kidlington West (C)
Chorley, Chorley North West (Ind)
Chorley, Clayton-le-Woods and Whittle-le-Woods (C)
Chorley, Coppull (Lab)
Corby, Danesholme (Lab)
Corby, Kingswood with Hazel Leys (Lab)
Corby, Lloyds (Lab)
Corby, Rural West (C)
Cornwall, St Mewan (C)
Crawley, Southgate (Lab)
Daventry, Abbey South (C)
Doncaster, Balby South (Lab)
Dudley, Norton (Lab elected as C)
East Northamptonshire, King's Forest (C)
East Northamptonshire, Rushden Sartoris (C)
East Sussex CC, Seaford North (C)
Eastleigh, Eastleigh North (LD)
Elmbridge, Cobham and Downside (Brexit Party elected as C)
Elmbridge, Weybridge Riverside (LD)
Epping Forest, Buckhurst Hill West (C)
Epping Forest, Chigwell Village (C)
Essex CC, Rochford North (C)
Fareham, Locks Heath (C)
Gloucester, Longlevens (C)
Gloucester, Quedgeley Fieldcourt (Ind elected as C)
Gloucestershire CC, Winchcombe and Woodmancote (C)
Halton, Broadheath (Lab)
Hampshire CC, Fareham Warsash (C)
Hartlepool, Hart (Lab)
Hartlepool, Manor House (Brexit Party elected as UKIP)
Hartlepool Seaton (elected as Putting Hartlepool First)
Hyndburn, Barnfield (C)
Hyndburn, Overton (Lab)
Isle of Wight, Ryde North West (C)
Kent CC, Whitstable East and Herne Bay West (C)
Kettering, Desborough Loatlands (C)
Kettering, Rothwell (C)
Kingston upon Hull, Newington and Gipsyville (Lab)
Lancashire CC, West Lancashire North (C)
Leeds, Rothwell (LD)
Lincolnshire CC, Market Rasen Wolds (C)
Liverpool, Warbreck (Lab)
Liverpool, West Derby (Lab)
Maidstone, Boxley (C)
Maidstone, Marden and Yalding (C)
Milton Keynes, Tattenhoe (C)
Newcastle upon Tyne, Blakelaw (Lab)
Newcastle upon Tyne, Elswick (Lab)
Newcastle upon Tyne, Lemington (Lab)
Norfolk CC, Freebridge Lynn (C)
Norfolk CC, Thetford East (C)
North Hertfordshire, Letchworth Wilbury (Lab)
Northampton, Brookside (Lab)
Northampton, New Duston (C)
Northamptonshire CC, Towcester and Roade (C)
Northumberland, Alnwick (C)
Norwich, Thorpe Hamlet (Ind elected as Grn)
Oldham, Hollinwood (Lab)
Oldham, Royton North (Lab)
Oxford, Barton and Sandhills (Lab)
Oxford, Hinksey Park (Lab)
Oxford, St Margaret's (LD)
Pendle, Barrowford (C)
Pendle, Brierfield (Lab)
Pendle, Horsfield (C)
Peterborough, Hargate and Hempsted (C)
Preston, Preston Rural East (C)
Redditch, Batchley and Brockhill (Lab)
Reigate and Banstead, Earlswood and Whitebushes (in respect of Susan Fenton, Grn)
Rotherham, Anston and Woodsetts (Lab)
Rotherham, Maltby (Lab)
Rotherham, Rother Vale (Lab)
Rushmoor, Fernhill (C)
St Albans, Redbourn (Ind)
St Helens, Windle (Ind elected as Lab)
Salford, Kersal (Lab)
Sandwell, Friar Park (Lab)
Sandwell, Old Warley (in respect of Sue Crumpton, Lab)
Sheffield, Broomhill and Sharrow Vale (Lab)
Sheffield, Manor Castle (Lab)
Sheffield, Walkley (Lab)
Shropshire, Oswestry East (Brexit Party elected as C)
Slough, Wexham Lea (Lab)
South Northamptonshire, Grange Park (C)
South Tyneside, Fellgate and Hedworth (Lab)
Stroud, Amberley and Woodchester (C)
Suffolk CC, Carlford (C)
Sunderland, Houghton (Lab)
Surrey CC, Guildford East (C)
Swindon, Rodbourne Cheney (Lab)
Tameside, Longdendale (Lab)
Trafford, Village (Ind elected as LD)
Tunbridge Wells, Pantiles and St Mark's (C)
Wakefield, Altofts and Whitwood (Lab)
Wakefield, Normanton (Lab)
Warrington, Birchwood (Lab)
Warwickshire CC, Bedworth Central (Lab)
Warwickshire CC, Feldon (C)
Warwickshire CC, Nuneaton Abbey (Lab)
Wellingborough, Croyland (C)
Wellingborough, Irchester (C)
West Sussex CC, Felpham (C)
West Sussex CC, Sompting and North Lancing (C)
Wiltshire, By Brook (C)
Wirral, Moreton West and Saughall Massie (C)
Wirral, Rock Ferry (Ind elected as Lab)
Wirral, West Kirby and Thurstaston (C)
Wokingham, Finchampstead South (LD elected as C)
Wolverhampton, Blakenhall (Lab)
Wolverhampton, Bushbury North (Lab)
Wolverhampton, Bushbury South and Low Hill (Lab)
Worcestershire CC, Arrow Valley West (Lab)
Errors possible.