George Osborne has labelled the defection of Douglas Carswell to Ukip as "regrettable and counter-productive".
Speaking in Brighton today, the Chancellor said that the best way to secure a referendum on Britain's membership of the European Union was to have a Conservative government after the next election.
"That's the choice people are going to face, whether it's at the by-election in Clacton or at the general election next year," Mr Osborne said.
More top news
Boris Johnson has said he will not be standing as Tory leader.
Leicestershire Police has launched a film to raise awareness of online grooming risks after the death of murdered teenager Kayleigh Haywood.
The man allegedly began 'injuring himself' with a payphone after he was placed in a cell.