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The party's deputy chief, who faces a tough battle to hang to his Eurosceptic seat in Moray, is now facing calls to return the money to the public purse or donate it to good causes as he originally pledged. Mr Robertson bought a "small" flat in the London Borough of Lambeth in February 2006 for £227,500 and designated it as his second home under the former rules for MPs' expenses. He went on to claim almost £60,000 in mortgage interest, £4,000 in stamp duty and legal fees and around £16,000 for repairs and furnishings, including a £2,300 leather sofa bed.

GETTY Angus Robertson had promised to donate thousands of pounds of profit to charity

When the expenses scandal broke in 2009, the MP was one of many politicians embarrassed by the revelations - and he responded by promising to repay any profit he made from the sale of the flat. He told Elgin's Northern Scot newspaper in May 2009: "I will not personally profit from capital gains accrued while mortgage interest was paid for with taxpayers’ money. The public purse will be reimbursed through full capital gains tax payments, with any remaining capital gains returned to the parliamentary authorities or to good causes in my constituency." The rules on second homes were changed at the 2010 General Election and Mr Robertson stopped claiming mortgage interest in July 2010. As a result, the parliamentary authorities ruled that he did not have to repay any capital gains.

GETTY Mr Robertson was one of many politicians embarrassed by the expenses scandal

From that point on, like many MPs including his Nationalist colleague Angus MacNeil, he rented out the flat and claimed for hotel accommodation on expenses while in London instead.

The public purse will be reimbursed through full capital gains tax payments Angus Robertson in 2009

In December 2013, the property was sold for £309,950, leaving Mr Robertson with a gain of £82,450. After paying capital gains tax of approximately £17,000, he would have been left with a net profit of more than £60,000. Douglas Ross, the Scottish Conservatives' candidate in Moray, said: "Angus Robertson made a very clear pledge that he would not profit personally from the sale of his taxpayer-funded London flat. "He said charities in Moray would benefit. We now know he did make a handsome profit after using his Westminster perks to play the London property market, so it's time he kept his word to the people of Moray.

GETTY Mr Robertson sold his London flat for £309,950

"If he has a shred of integrity, he will name the causes to which he'll donate the money." The flat on Kennington Road is located about a mile from the Palace of Westminster across the Thames and close to the Imperial War Museum. As well as the sofa bed, Mr Robertson kitted it out with a £400 home cinema, an espresso maker, Sabatier knives and a £20 corkscrew. Last night, a spokesman for the SNP deputy leader appeared to suggest the profit from the sale of the flat was swallowed up by the costs of Mr Robertson's divorce from first wife, Carron.

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