The Speaker steps in

In what is probably the most remarkable PMQ's i've seen for a long time, as David Cameron went head to head...with the speaker!

Commons Speaker Michael Martin, at first, sparked uproar at prime minister's questions by stopping David Cameron asking Tony Blair who he wanted as "his successor". However, in an almost unprecedented move, the Speaker told the Tory leader he could not ask about the Labour leadership.

But in an equally unheard of move David Cameron responded by saying "Mr Speaker are you honestly saying we cannot ask the prime minister of the country..." before being interrupted again.

By now the commons was in uproar, with the speaker threatening to suspend the sitting.

This is not the first time the Mr Martin has protected Mr Blair from awkward questions, and I dare say it won't be the last either.