Page last updated at 11:36 GMT, Monday, 1 June 2009 12:36 UK

Out for a duck - which MPs go, which stay

Is there any logic as to which MPs are punished, which ones have to quit and which ones are protected? Gavin Esler is joined by Polly Toynbee, Professor AC Grayling, Stephen Pound MP and Grant Shapps MP to discuss.

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