 However, this created additional difficulties on clear nights when a full moon was predicted (or as Churchill romantically termed it 'When the Moon is High') - so the authorities looked for an alternate site north of London.Tree offered Churchill use of Ditchley, which thanks to its tree coverage and no visible access road made it an ideal site which Churchill was happy with.Churchill first went to Ditchley in lieu of Chequers on 9 November 1940, accompanied by Clementine and his daughter Mary.