Will this be the most powerful tory in Britain?
Michael Portillo became the latest top tory to express his fears about Boris Johnson winning the London election.
Speaking last night on BBC's This Week, he refused to answer whether he thought Boris to be a serious politician. He told Andrew Neil:
"I have not seen Boris putting forward serious policies. That clip I saw a moment ago when he said it was all about crime is the first time I have seen him make a serious point, because until now he has just been about bendy buses... Even in that clip one had no understanding about how he was going to fight crime."
He went on to describe the possibility of Boris being the most powerful Tory in Britain as "extraordinary."
Portillo's unusual reluctance to endorse the Tories main hope for electoral success was explained by Diane Abbott:
"He thinks he is a joke. He thinks Boris is a joke."
The comments come just a week after it was reported that a member of David Cameron's shadow cabinet described the possibility of Boris winning as "terrifying".
You can watch the latest This Week here.