Re: Well I personally think it is a good idea....
France is way more socialist than the UK. You're forgetting President Hollande by the way, who was from the Socialist Party. Sadly for them, they can't forget him - they got 7% in the last national election.
You forget that a French right winger is to the left of most UK centrists. Britain has been politically to the right of most European countries for a long time - though Europe in general has moved a bit rightward since Thatcher's time.
It's a bit like the USA, where most democrats would traditionally have fit happily in the Conservative Party and been too right wing for Labour. Though the Democrats have moved a bit left in the last decade and the Republicans have gone way off to the right.