 In "The Gathering Storm", Churchill explains that the operation was called this because it was so small.Stationed in France to guard the airfields of the RAF's Advanced Air Striking Force during the Phoney War, 53rd (City of London) Heavy Anti-Aircraft Regiment, Royal Artillery code-named its gun-sites PIP I & II, SQUEAK I & II and WILFRED I & II (Regimental HQ was codenamed PIXO).According to 2007 Nobel Prize in Literature winner Doris Lessing's autobiography, Wilfred, or "Wilfski" as she calls him, was based on Trotsky.