MPs' expenses: our small part in their downfall

I remembered the other day that we (Information Design Unit, my former company) once had the job of designing the House of Commons expenses forms. The job went on for a long long time, as different wordings were tried and rejected. Obviously I would be sent to the tower for showing them (and I don't know which version, if any, was finally used), but it seems OK to mention that the declaration closely reflects the HMRC rules on taxation of expenses: "I confirm that I incurred these costs wholly, exclusively and necessarily... for the purpose of performing my duties as a Member of Parliament". I would say that is pretty clear.