The following events all occurred in living memory. Can you guess the year?
A 1. The Abadan Crisis between UK and Iran began 2. Labour Minister Aneurin Bevan resigned from the government 3. Ivor Novello and Ernest Bevin died 4. King Leopold III of the Belgians abdicated B 1. Manchester United beat Benfica 4-1 in the final of the European Cup 2. Yuri Gagarin died in a plane crash 3. A two-tier postal system began in the UK 4. Bobby Kennedy was assassinated C 1. Laurence Olivier won a Golden Globe for Best Actor for his performance in his film version of Hamlet 2. Vyacheslav Molotov stepped down as Soviet foreign minister 3. The de Havilland Comet prototype made its first flight 4. Boxer Joe Louis announced his retirement