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David Davies tells John about his concerns about communications director Andy Coulson's departure from David Cameron's inner-circle of decision-makers.

The Transport Secretary Philip Hammond and Conservative deputy chairman Michael Fallon are John's other guests from the Conservative Party.

Shadow Olympics Minister Tessa Jowell gives her views on the rival bids for the Olympic Stadium in east London, as well as the resignation of Shadow Chancellor Alan Johnson, and his replacement by Ed Balls.

And Liberal Democrat pundit Olly Grender and The Telegraph's political editor Andrew Porter offer their interpretation of a busy week in politics.

Follow John on Twitter @Jponpolitics.