It is reported that Boris was seen out on the streets drumming up support for the Tory candidate in the Stonebridge (Brent) by-election. Boris certainly had an effect - Labour won (handsomely) and the Tory candidate came in fourth (behind Respect).
The results in full:
Zafar Van Kalwala, Labour: 1432
Sandra Elina Wiltshire, Lib Dem: 864
Sarah Cox, Respect: 237
Funmi Aladeshe, Conservative Party: 177
Brian Orr, Green Party: 51