DAVID CAMERON is being tipped to fight a third General Election in 2020 because the “lure of power will be too strong”.

Ahead of the last General Election, the Conservative leader vowed not to serve more than two terms as Prime Minister.

However, senior figures in the party have said they now believe he is planning to U-turn on his promise not to fight another election in the wake of the Tories’ unexpected victory.

Last week, Cameron refused to categorically rule out standing in 2020, instead saying that he will “be PM for the next five years” and that “I don’t think anyone should go on for ever and ever”.

Now senior sources have suggested he will want to fight for a third term.

“There is a growing belief that the lure of power will be too strong,” one senior Tory reportedly said.

“David will be asked by MPs from across the party and he won’t be able to say no.

“He has just won a majority. He is stronger than ever and I expect him to continue and find a way to go back on what he said before the election.”

George Osborne is considered to be the clear favourite to replace Cameron if he decides to step down.

However, senior figures in the party have voiced concerns that the Chancellor would not be able to get the support of voters in poorer parts of England and Wales.

Boris Johnson, the Mayor of London, and Theresa May, the Home Secretary, are understood to be planning to run against the Chancellor in a bid to lead the Tory party.

Sajid Javid, the Business Secretary, Jeremy Hunt, the Health Secretary and Philip Hammond, the Foreign Secretary, are also thought to be considering a run.