Dave and George can’t be much company these days as Murdoch’s son-in-law seems to have forgotten he came to his 50th birthday party on Saturday night. Mandrake quotes Elizabeth Murdoch’s husband as saying “no…. please let me know if you would like a more explicit clarification” when he was asked whether the PM and Chancellor came. It was later revealed by the Speccie that Dave was there, as was Tony and Cherie, all jiving along to Bono. A No.10 source told Guido last night: “Let’s just say Mandrake has got some very dodgy sources.” Not the greatest PR strategy from a pro.