Events from the year 1951 in the United Kingdom. This is the year of the Festival of Britain and a general election returning Winston Churchill to power. Incumbents Monarch – George VI Prime Minister - Clement Attlee (Labour) (until 26 October), Winston Churchill (Conservative) (starting 26 October) Parliament 39th (until 5 October) 40th (starting 31 October) Events January British Board of Film Censors introduces X rating for films "Suitable for those aged 16 and over". Ford Consul car introduced. 1 January – production run of radio series The Archers begins on the BBC Light Programme. It will still be on the air 70 years later. 9 January – the government announces abandonment of the Tanganyika groundnut scheme, writing off £36,500,000. February – Ferranti deliver their first Mark 1 computer to the University of Manchester, the world's first commercially available general-purpose electronic computer. 21 February – an English Electric Canberra (with Rolls-Royce Avon engines) becomes the first jet to make an unrefuelled Transatlantic flight, taking 4 hours 37 minutes from RAF Aldergrove in Northern Ireland to Gander in Newfoundland. 26 February – film noir Pool of London is released, the first British film with a major role for a black actor, Bermuda-born Earl Cameron. 12 March (dated 17 March) – the character Dennis the Menace first appears in The Beano comic. 13 March – Pineapple Poll, a Gilbert and Sullivan-inspired comic ballet, created by choreographer John Cranko with arranger Sir Charles Mackerras, is premiered at Sadler's Wells Theatre by the Sadler's Wells Ballet. 11 April – the Stone of Scone is located at Arbroath Abbey, having been stolen by Scottish nationalists on Christmas Day 1950. 17 April The submarine HMS Affray sinks, killing all 75 crew members. Seven unofficial dockers' leaders are acquitted of offences under a wartime regulation intended to prevent industrial disputes. The Peak District is established as the first of the national parks of the United Kingdom. The Lake District is designated so in May, and designations of Snowdonia and Dartmoor come into effect on 20 November. 22–25 April – Korean War: Battle of the Imjin River: the 29th Infantry Brigade of the British Army serving with the United Nations put up brave but ultimately unsuccessful resistance to the Chinese advance, with 141 UN troops killed. The last stand of the 1st Battalion, The Gloucestershire Regiment (the "Glorious Glosters") at Hill 235 rapidly becomes part of modern military