The initial amount that Sir Thomas wanted returned was £1.3m, although this figure was cut by £180,000 after certain MPs appealed against the initial ruling. Sir Thomas said the expenses system was "deeply flawed", the rules "vague" and it had been up to MPs to "self certify" the propriety of their claims.
MPs had to sign a declaration with each claim saying "that I incurred these costs wholly, exclusively and necessarily to enable me to stay overnight away from my only or main home for the purpose of performing my duties as a Member of Parliament". In his report Sir Thomas pointed out there had been a "culture of deference" to MPs by expenses officials and "no audit of any kind" of second homes expenses during the period he covered.
The report said £800,000 had been repaid already - some unconnected to Sir Thomas's demands - since April 2009, the month before the scandal broke.