Boris swears allegiance to Cameron in gag-laden speech

The London mayor Boris Johnson was given a thunderous reception before his speech on the sidelines of the Tory conference in Birmingham this evening.

His gag-laden speech made reference to Cameron-supporters as "Cameroons" and his own re-election as "Mission Imborisable".

London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today Credit: Stefan Rousseau /PA Wire

But he also confirmed his loyalty to the Prime Minister and made a effort to dispel rumours of a clash over the third runway at Heathrow:

"It is sometimes inevitable that the mayor of a great city will find himself saying things that do seem at variance with national policies," he said.

"No-one as a result should have any cause to doubt my admiration for David Cameron."