Meet Shailesh Vara, whom I hereby nominate as the MP with the most barefaced cheek.
Vara, Conservative MP for North West Cambridgeshire, was elected to parliament in the General Election of May 2005. During that year he submitted an expenses claim for £22,600.51 - not vast compared to other MPs you might think.
But Vara's claim to to the Cheeky Boy title comes from the fact he sought reimbursement for expenses incurred before he was an MP!
I'd write more, but I'm putting together an expenses claim for the fees office at this very moment.
Link Daily Telegraph