I’m not sure. Usually odds are set based on the stakes placed, but I can’t imagine they are seeing huge numbers of bets for all those seats, so you would imagie there’s some analysis or local knowledge at play.

The shortening of the Lib Dems in Tooting from 100/1 to 50/1, for example, suggests they are at least aware that Labour have always struggled to hold them off from taking Graveney Ward.