Battle's MP has defended claiming £21,000 in expenses over just three months, saying it was partially due to a lump sum rent payment.
Greg Barker, Tory MP for Bexhill and Battle, was one of 186 Conservative MPs to voluntarily disclose a breakdown of their expenses claims under leader David Cameron's drive for more openness.
The total amount of expenses claimed by Mr Barker was a
lmost double the amount claimed by some fellow Conservative MPs in the region.
Wealden MP Charles Hendry claimed £12,000 whilst Eastbourne MP Nigel Waterson claimed £11,000.
In the Right To Know list, published by the Party last week, it was revealed Mr Barker's biggest expense was for rent, claiming £8580 between the beginning of April and the end of June.
But the MP said the amount was for six month's rent, for April to September 2008.
Another large figure on the list was £2,500 for a new IT system for Mr Barker's constituency office in Bexhill.
Mr Barker said: "At the beginning of the financial year, I purchased a new IT system for the office in Bexhill which is a case management IT system, which allows us to more effectively take constituents' correspondence and does away with a lot of paper filing."
He added: "You really need to look at the full year to get the full picture."
But Mr Barker said he fully supported Mr Cameron's decision to reveal MP's quarterly expense claims.
He said: "My constituents are entitled to know how we are spending their money.
"The Conservatives are the first party to reveal this much information and we are doing so voluntarily.
"It's a much more detailed break down of expenses then official rules require.
"I'm very glad we are leading the way towards greater transparency."
Other expenses claimed by Mr Barker include a £3,351 for phone bills, £749 for car mileage, £382 for rail fare, £1,604 for office equipment and £3,878 for Parliamentary Resources Unit subscription.
As well as publishing details about MPs expenses, the Right To Know list also includes information about any family members employed by each member of parliament.
David Cameron said: "Politicians need to do everything they can to regain the trust of the British people, and transparency has a key part to play in that process.
"We must show that we're spending taxpayers money sensibly and correctly."
He added: "We are the first party to demand this information from our members, and our MPs are voluntarily revealing a much more detailed breakdown of their expenses than official rules require them to.
"I'm glad that we're leading the way."
A full list of expenses can be found on the Conservatives' website.
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