Why did Michael Palin undress as the prime minister?

Why did Michael Palin undress as the prime minister?
Are there cracks appearing in cabinet unity?
Was PMQs a Peep Show for Paterson Joseph?
Who will be the MMP for North East Somerset and Hanham?
Matt Chorley brings you the who, what, where, why and when of British politics.
If you've got urgent questions... then email Chorley@bbc.co.uk