An aide to David Cameron has resigned after he and his fellow MP wife, Julie Kirkbride, claimed on their parliamentary expenses for both their homes.
Andrew Mackay became the first person to lose his job over the expenses scandal exposed by The Daily Telegraph.
He used his second home allowance to pay almost £12,000 a year in mortgage interest payments on their joint flat near Westminster.
Meanwhile his wife, Julie Kirkbride, the Tory MP for Bromsgrove, has used hers to pay off a similar amount on the loan for their family home in her constituency.
They were able to use public funds to pay for both as “second homes” for at least eight years, after Commons authorities agreed he could name the family home as his main residence while she named the London flat as hers.
This week Mr Mackay, who represents Bracknell in Berkshire, claimed there was “nothing unreasonable” in his expense claims, while Miss Kirkbride has previously said she wanted her address kept secret from admirers or people with a grievance against her.
Mr Mackay’s files were examined by Conservative party officials, who ruled that they were “unacceptable”.