Croydon Central's MP is set to lose his set in the 2015 general election, polls suggest.

Conservative Garvin Barwell is likely to be ousted from his marginal seat by a swing towards Labour, according to data published by Lord Ashcroft, a major donor to the party.

His polls show a five per cent swing away from David Cameron's party in London constituencies, which mean Mr Barwell would be pipped to the post by two percentage points if the election was today. 

Mr Barwell said: "Croydon Central is a marginal seat. I’ve never taken people's support for granted and I never will.

"I've done this job to the best of my ability and at the next election the people of Croydon Central will get to decide if I deserve to go on doing it."

The Croydon Central MP was elected in 2010 with 39.5 per cent of the vote, a margin of 2,969.

A bill he tabled to tackle discrimination against people with mental illnesses became an Act of Parliament after being granted royal assent last month.