Director Sam Mendes' all-star birthday party, featuring secret codes, helicopters and a £6million hunting lodge - it's worthy of a new Bond movie  Sam Mendes is no stranger to theatrics and a big budget, having directed James Bond films Skyfall and Spectre. But the Oscar winner’s latest project, complete with the codename ‘Red Eagle’, was not a 007 mission – instead, it was the blueprint for his 60th …