Nick Clegg has launched a scathing attack on Boris Johnson over the Mayor of London's speech on the EU today.
The Deputy Prime Minister said threats to "flounce out" of the union were "deeply irresponsible" and motivated by Mr Johnson's personal ambitions.
The comment about Mr Johnson's ambitions came after he used a speech about Europe to announce his intention to stand for Parliament in 2015.
“I think this speech is more to do with Boris Johnson’s political ambitions rather than what is right for the United Kingdom," the Lib Dem leader said.
"I think it is deeply irresponsible to suggest that we can flounce out of the European Union and I don’t think it's the way that you get the reform," Mr Clegg added.
More top news
Train operating companies are failing to properly inform passengers about their rights, according to Which?
The average house price in a UK city has surged by nearly a third over the last five years, a shocking report has found.
Former foreign secretary David Miliband says he is 'deeply concerned' and refuses to rule out a future run for the Labour leadership.