Mmmm.  This is an interesting turn of events:

A DOCUMENT linking Margaret Thatcher to a US corruption probe is so explosive civil servants have been asked to ensure it remains "sealed".

The 79-year-old former Premier is said to have met Congressman Tom DeLay in Britain while he was on a suspected favours-for-freebies scam.

In return for his free holiday, DeLay – who resigned as Republican leader of Congress last week after being accused of laundering political funds – allegedly backed legislation favourable to lobby groups.

Disclosing that US authorities were seeking aid from UK counterparts, a secret Home Office briefing says: "One visit to the UK involved a meeting with Mrs Margaret Thatcher.