On 26 May 1940, the Battle of Dunkirk began. (TV: Co-Owner of a Lonely Heart)
In 2006 (TV: Aliens of London, World War Three) UNIT released an embargoed press briefing on 26 May, reporting on Harriet Jones' tribute to those lost in the destruction of 10 Downing Street, which she blamed on terrorists. (PROSE: Number Ten Pays Tribute to UNIT) Other accounts however dated the Slitheen incursion to 6 March (TV: Aliens of London, et al.) or 28 June. (PROSE: Operation London)