For your eyes only: Why is the greatest archive of British cinema stashed away in a top-secret bunker worthy of a Bond villain?

Clearly, they’ve been watching too many Bond films at the BFI. I’m standing outside a spooky barbed-wire compound in the middle of Nowhereshire, nine miles off the M40. I can’t tell you where, because it’s a secret, except to say it’s a remarkably dreary part of Warwickshire. This place doesn’t even have a postcode, as it used to be an MoD bunker, where nuclear warheads were built and stored. Welcome to the home of British cinema, the British Film Institute’s Master Film Store.