“I am not standing for re-election,” he Mr Cameron said, apparently a veiled reference to Mr Johnson’s leadership ambitions.
“I have no other agenda than what is best for our country. I'm standing here telling you what I think.”
Mr Cameron also ridiculed Mr Johnson’s ambiguous apparent suggestion in a recent newspaper column that voting to leave could lead to a better deal for Britain in Europe.
“We should also be clear that this is a final decision,” he told MPs, arguing that a second renegotiation was “not on the ballot paper”.
“I won’t dwell on the irony that some people who want to vote to leave apparently want to use a leave vote to remain. But such an approach also ignores more profound points about democracy, diplomacy and legality.”
I love Cameron's bold response to Johnson's cynical decision. The London Mayor will not be able to shake the accusation that his decision to back Leave was insincere.
I'm also glad that Cameron tackled the argument that voting Leave could mean a second referendum on a better deal. That claim is wrong on so many levels. If the European leaders were not prepared to give Cameron a better deal to stay, they are not going to give Johnson or Gove a better deal to leave with. Furthermore, given that most of the British public has no real interest in this referendum, they are hardly going to vote for another referendum. That idea is more likely to make people vote Remain just to get the whole wretched business over and done with.