Mayor Boris Johnson will be in Croydon North today ahead of next weeks by-election in the seat.
He will campaign alongside Conservative Party candidate Andy Stranack.
On Thursday Ed Miliband will join Labour's campaign.
More top news
Eight fire engines and 60 firefighters are working to try and put out a large fire at a cafe in Fulham. One person has been injured.
A coffee shop in Fitzrovia is allowing customers to buy discounted hot drinks and pass them on to a homeless person
A man has been jailed for seven years for raping a woman after she fell asleep on a night bus in Hampstead