YouGov found London voting intentions of CON 35%(nc), LAB 45%(+3), LDEM 8%(nc), UKIP 8%(-2), GRN 4%(nc). Labour are up three since June, but this poll would still suggest Labour doing slightly worse in London than elsewhere (a ten point lead for Labour in London is a 4 point swing since the general election, whereas GB polls are currently showing a 5 1/2 point swing to Labour.)
For the record, London voting in the 2010 General Election went:
Labour 36.6% (down 2.3% since 2005) and 38 MPs;
Tories 34.5% (up 2.6%) and 28 MPs;
Lib Dems 22.1% (up 0.2%) and 7 MPs.
By consensus Labour:
- did better in London than across the UK (vote down 6.2%), and
- far better than England taken together (vote down 7.4%).
These things have the characteristic of a rubber band: they stretch, but only so far — and the Labour vote inevitably has natural limits: even in the wonder year of 1997 the vote in London was
- 49.5% Labour, 31.2% Tory, 14.6% Lib Dem.
One other figure worth mentioning is the 2014 London Borough elections (the most recent proper poll). This, on a smaller turn-out, which itself tends to count against Labour, had:
Labour 37.33% (up 4.83% on 2010 Borough Elections),
Tories 26.32% (down 5.42%) and
LibDems 10.63% (down 11.73%).
Were we to take that Evening Standard/YouGov poll as total Gospel, Labour is way ahead, even from May, the Tories are a trifle restored (thanks to the UKIP decline?), and the LibDems still barely bog-snorkelling.