Churchill was not, however, entirely alone in his ‘wilderness’. As a privy councillor and an elder statesman, even without power, he wasn’t without some influence and retained contacts within the political arena, keeping his ‘finger on the pulse’. In 1934 he was drawn into deliberations about defence matters (principally about the problems of defending Britain from attack by air) and, from June 1935 until the outbreak of war in 1939, served on the Air Defence Committee, so was well informed about Britain’s ability to combat the German Luftwaffe. He was also kept informed by disaffected colleagues in the intelligence service, RAF and Foreign Office. Churchill held court at Chartwell, ‘a sort of alternative Cliveden; a regular meeting place for Churchill’s extensive circle of political associates and admirers, with an inner circle of particular friends at its core’ (Best, ). Guest included the three ‘Bs’ – Beaverbrook, Birkenhead (F. E. Smith) and Brendan Bracken – young conservative MPs who kept him in touch with what was going on within parliament. And of course the ‘Prof’ was also frequently at Chartwell. Professor Lindemann, the leading Oxford University scientist advised Churchill on aspects of air warfare in the 1930s and was a trusted source of information on technical matters. To learn more about Churchill’s political allies and advisers, read the (made publicly available to mark the anniversary of Churchill’s death).