Interestingly I read today that David Laws, Treasury Chief Secretary, is now embroiled in a repayment of ?40,000 of expenses http://www.guardian.co.uk/politics/2010/may/29/david-laws-treasury-expenses-claim and is "fighting for his political life", well The Guardian thinks so anyway. I imagine it's purely coincidence that it was him who was originally pencilled in to appear http://www.guardian.co.uk/media/2010/may/27/government-boycott-question-time-alastair-campbell .