It is May 1940, the early days of the War. Churchill has just become Prime Minister and we are at Bletchley Park. Victor Kerr, head of vetting and security at Bletchley Park, has been found dead in his office this morning, stabbed with the ceremonial dagger he keeps on the wall. A valuable glass statue which was only installed yesterday is also missing from his office. Exercise your inner detective and decide which of the suspects has carried out a dastardly murder.