Blue plaque to be unveiled for woman who was Churchill's 'favourite spy'

London marker will remember Christine Granville, Britain's first female special agent

She was a Polish countess and Churchill's favourite spy whose many dazzling accomplishments included smuggling microfilm across Europe which proved Hitler's plans to invade the Soviet Union.

But while she devotedly served the British government Christine Granville was also horribly let down by it, struggling to get full citizenship after the war and forced to work as a bathroom attendant on cruise ships.