Cold War: Charles Powell note for MT (planned UK expulsion of Soviet diplomats) ["some disgraceful leaks here - all through Diplomatic correspondents, which probably speaks for itself"] [released Mar 2019]

Undated but plainly 30 Jan from the date of the press stories attached. The implication of Powell's remark that the leak was through diplomatic correspondents would seem to be that he thought it came from the Foreign Office. See discussion on this page. Read all documents from the 1989 release of MT's party and personal papers.