Why 150 seats instead of 100, 150 has an average of 14,546
Meanwhile I have drawn up plans for 100 seats with an average of 21,818 and if you like I shall show you them
You are right that on the usual allocation criteria I use Wales would have had 100 seats with an average electorate of around 22,000 but it so happens that when I played around with the figures I much preferred the look of an arrangement based on 150 seats which enabled whole seats to be awarded to areas like Prestatyn, Llandudno, Porthcawl, Holy Island, I allowed a similar over-representaion in Devon & Cornwall and for similar reasons.
There is also perhaps a bit of a relationship to the smaller size of Welsh parliamentary constituencies currently. Though my land seats don't fit into constituency boundaries (the original intention when I started doing this stuff 30 years ago is that they would) I typically have 3-4 land seats per parliamentary constituency and 100 seats here would only equate to 2.5 which doesn't give me the kind of level of detail I seek from this process.
Naturally I'd be interested in seeing what you've come up with for your 100 seat plan. Fwiw I think you're on a hiding to nothing with Scotland
Well then,
WALES 100 SEATS
Important-
One of my favourite parts of this plan is that due to the number of valleys & rivers all seats outside of towns/cities with more than 2 seats (Deeside, Wrexham, Llanelli, Swansea, Neath, Bridgend, Barry, Cardiff, Newport)(and also towns named after rivers) get 2 names, a Geographical name and a Town name, and the choice is whether to have all town names or all Geographical names
Sir Fôn (Anglesey)
Cymyran OR Holyhead 23971
Menai 25316
Sir Meirionnydd (Merionethshire)
Snowdonia OR Meirionnydd 22424
Sir Gaernarfon (Caernarfonshire)
Llŷn OR Pwlhelli 20859
Padarn OR Arfon 20776
Llewelyn OR Bangor 19745
Conwy 18898
Creuddyn OR Llandudno 21803
Sir Ddinbych (Denbighshire)
Colwyn 17146
Elwy OR Towyn 19595
Upper Clwyd OR Denbigh 20775
Berwyn OR Corwen 24163
Wrexham South 24736
Wrexham West 21359
Wrexham Central 21654
Wrexham East 21523
Sir Fflint (Flintshire)
Lower Clwyd OR Rhyl 24176
Ffyddion OR Prestatyn 25044
Dee OR Flint 23308
Deeside West 22807
Deeside East 19779
Alltami OR Buckley 20291
Alyn OR Mold 22711
Sir Drefaldwyn (Montgomeryshire)
Vyrnwy OR Welshpool 22645
Hafren OR Montgomery 22611
Sir Faesyfed (Radnorshire)
Fforest Faesyfed OR Radnor 19832
Sir Frycheiniog (Brecknockshire)
Beacons OR Brecon 15994
Cambrians OR Builth 16447
Sir Aberteifi (Cardiganshire)
Aberystwyth OR Ystwyth 23741
Teifi OR Cardigan 26691
Sir Benfro (Pembrokeshire)
Preseli OR Fishguard 24960
Cleddau Ddu OR Haverfordwest 20825
Cleddau Wen OR Milford 19897
Daugleddau OR Pembroke 21380
Sir Gaerfyrddin (Carmarthenshire)
Lower Towy OR Carmarthen 22694
Gwendraeth OR Kidwelly 23704
Llanelli West 21162
Llanelli East 22230
Upper Loughor OR Ammanford 20986
Upper Towy OR Llandeilo 23111
Sir Morgannwg (Glamorganshire)
Gower 23636
Swansea Mumbles 23215
Swansea Castle 22606
Swansea Llansamlet 20125
Swansea Morriston 22433
Swansea Cwmdu 22608
Lower Loughor OR Gorseinon 20753
Tawe OR Clydach 22380
Dulais OR Glynneath 19290
Neath-Coedffranc 19864
Neath-Briton Ferry 20941
Neath-Port Talbot 23288
Afan-Llynfi OR Maesteg 23364
Ogwr-Gawr OR Sarn 21989
Bridgend East 21920
Bridgend West 19829
Kenfig OR Porthcawl 23302
Glamorgan OR Llantwit 24227
Lower Ely OR Llantrisant 23859
Barry West 18745
Barry East 20146
Cardiff Penarth 23988
Cardiff Butetown 20022
Cardiff Rhymney 24276
Cardiff Cyncoed 26653
Cardiff Pontprennau 20282
Cardiff Llanishen 22045
Cardiff Whitchurch 18395
Cardiff Cathays 20642
Cardiff Grangetown 20311
Cardiff Llandaff 24679
Cardiff St Fagans 22675
Cardiff Radyr 24757
Upper Ely OR Tonyrefail 20999
Rhondda Fawr OR Tonypandy 26546
Rhondda Fach OR Porth 18736
Lower Taff OR Pontypridd 21958
Lower Cynon OR Mountain Ash 20265
Upper Cynon OR Aberdare 21681
Mid Taff OR Merthyr Tydfil South 21890
Upper Taff OR Merthyr Tydfil North 17543
Upper Rhymney OR Rhymney 22507
Mid Rhymney OR Bargoed 17231
Lower Rhymney OR Ystrad Mynach 20609
Porset OR Caerphilly 24007
Sir Fynwy (Monmouthshire)
Newport Liswerry 21701
Newport Caerleon 21723
Newport Rogerstone 25728
Newport Duffryn 22220
Lower Ebbw OR Risca 23176
Sirhowy OR Tredegar 22775
Ebbw Fawr OR Ebbw 25710
Ebbw Fach OR Abertillery 21843
Upper Lwyd OR Pontypool 19528
Mid Lwyd OR Cwmbran North 20006
Lower Lwyd OR Cwmbran South 20194
Lower Usk OR Usk 18189
Upper Usk OR Abergavenny 22652
Wye OR Monmouth 21608
Severn OR Caldicot 21802