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
Council workers uncovered the AK-74 concealed in the undergrowth.
The thief, who used a walking stick, was helped by a man who disabled the lock before pushing the woman away.
More than 40,000 new property millionaires have been created across Britain this year so far amid rising house prices.