I was there for the Lib Dems. It felt very low key. Most of the excitement had gone as this time around we all knew what the other parties were counter-proposing. No surprises all round.
Presumably Labour's south London submission is about restoring a clear successor seat for each of their incumbents. Continuity for all existing seats was a point they particularly stressed. Helen Hayes was originally Dulwich based but she might have to face Ellie Reeves for that, who otherwise only has the new kind-of-marginal Beckenham. Not sure if enough of the Lambeth bits are going into either the Clapham & Brixton or Norwood seats for her to be able to exclude challenges. But both are very different from her current patch. But the Labour counterprosal to retain Dulwich & W Norwood is a bit rubbish. It splits East Dulwich from Dulwich, splits Camberwell and needs a split of Lambeth's Thornton ward (bizarrely splitting it east/west when the LGBCE has just split it north/south, which is much more natural).