Ladbrokes bookmakers is offering odds on Boris Johnson taking Sir John Randall's seat after the Uxbridge and South Ruislip MP announced he will not stand in the 2015 general election.
The odds for the Mayor of London stepping in to what is considered one of London's safe Tory seats if he decides to return to Parliament are at 3-1.
Ladbrokes' latest odds on where Boris will stand in 2015:
6/4 Does not stand for parliament
3/1 Uxbridge & South Ruislip
7/2 Hertsmere
6/1 South Cambridgeshire
7/1 Kensington
8/1 Hornchurch & Upminster
12/1 Louth & Horncastle
16/1 Richmond Park
20/1 Banbury
25/1 Orpington
25/1 Henley
25/1 Hove
500/1 Camberwell & Peckham
Mr Randall announced the news as a meeting with the Conservative Association on Wednesday, July 9.
He says as one of the area's constituents, he will support whoever takes his place.
But an Uxbridge Gazette poll is so far suggesting Bojo is a no go for the town.