Ken & Boris both receive some "friendly fire"

In a war what happened yesterday would of been described as "friendly fire" or "blue on blue" and although there was a "blue on blue" incident later in the evening. Yesterday afternoon there was a "red on red" incident as the Lord Sugar of Clapton opened up with both barrels on Ken Livingstone using the social networking site Twitter to say that "Livingstone must Not get in". Mr Livingstone's team were very quick to start sending Direct Messages to Labour supporters asking them to unfollow and not to retweet Lord Sugar's comments.

Ken with no regret - you're fired

As Lord Sugar tweeted that "SKY doing live Mayoral interview with candidates at 8pm today Johnston v Livingstone is real issue. Livingstone must NOT get in on 3rd May" he continued "I don’t care if Ed Miliband is backing Livingstone . I seriously suggest NO ONE votes for Livingstone in the Mayoral elections". When asked for a comment the Labour candidate's team declined to answer.

However it wasn't just Ken Livingstone who suffered incoming fire from his own party. A surprising "blue on blue" happened when the former, Conservative, Cabinet Minister Michael Portillo told Andrew Neil on the BBC's This Week last night that he "wouldn't be voting for Boris". But he would "vote for the candidate who supports a third runway at Heathrow airport". The only candidate to pledge that is the Independent candidate Siobhan Benita.

Michael Portillo                Siobhan Benita

Responding to the news of Mr Portillo's comments Independent candidate Siobhan Benita told me "I am delighted Michael Portillo says he's supporting the candidate who backs the 3rd runway. I am the only candidate who is supporting it. I have said throughout this campaign that the 3rd runway is the best option for London and the whole UK. It will create tens of thousands of jobs, bring billions of pounds into the economy and retain London's position as a global player.If we don't back a third runway, it could signal the death knell for Heathrow with disastrous implications for jobs and the economy. The fact that a senior former Tory Cabinet Minister is not backing the Tory party's own candidate speaks for itself".