But then, few things about the case of Mark David Chapman were typical.

CNN: Letters from John Lennon's killer to be sold

Two other Labour MPs - David Chaytor and Ben Chapman - have also admitted "errors" in claiming for mortgages that had already been paid off.

BBC: Police action urged over expenses

It's possible St David may not have approved of several entries in Mr Chapman's name on MySpace.com.

BBC: Last Updated: Friday, 2 March 2007, 10:41 GMT