'The decision to sell the gold – taken by Mr Brown when he was Chancellor – is regarded as one of the Treasury's worst financial mistakes and has cost taxpayers almost £7 billion.

Mr Brown and the Treasury have repeatedly refused to disclose information about the gold sale amid allegations that warnings were ignored.

Following a series of freedom of information requests from The Daily Telegraph over the past four years, the Information Commissioner has ordered the Treasury to release some details. The Treasury must publish the information demanded within 35 calendar days – by the end of April.

The sale is expected to be become a major election issue, casting light on Mr Brown's decisions while at the Treasury.'

Read more: Explain Why You Sold Britain's Gold, Gordon Brown Told