1940 in the United Kingdom

Events from the year 1940 in the United Kingdom. The year was dominated by Britain's involvement in the Second World War, which commenced in September the previous year, as well as the numerous enemy air raids on Britain and thousands of subsequent casualties. Although the war continued, Britain did triumph in the Battle of Britain and Nazi Germany's invasion attempt did not take place.Bloch, Leon Bryce and Lamar Middleton, ed. The World Over in 1940 (1941) detailed coverage of world events online free; 914pp

Incumbents Monarch – George VI Prime Minister - Neville Chamberlain (Coalition) (until 10 May), Winston Churchill (Coalition) (starting 10 May)

Events

1 January – World War II: Britain calls up 2,000,000 19- to 27-year-olds for military service. 3 January – Unity Mitford, daughter of David Freeman-Mitford, 2nd Baron Redesdale, and fervent admirer of Adolf Hitler, having attempted suicide, returns to England from Germany (via Switzerland); she is carried down the gangplank of the cross-channel ferry at Folkestone on a stretcher. 5 January – Oliver Stanley replaces Leslie Hore-Belisha as Secretary of State for War. 7 January – The BBC Forces Programme begins broadcasting; it becomes the most popular channel among civilians at home as well as its primary target audience. 8 January – Food rationing is introduced; it will remain in force until 1954. 9 January – World War II: liner Dunbar Castle of the Union Castle Line hits a mine in the English Channel and sinks with the loss of 9 men (2 dead and 7 missing). 17 January – A wave of freezing weather afflicting most of Europe leads to the River Thames freezing for the first time since 1888. 18 January – Explosion at Waltham Abbey Royal Gunpowder Mills (five killed). 26–30 January – Severe ice storm across the UK. 16 February – Altmark incident: Royal Navy destroyer pursues German tanker Altmark into the neutral waters of the Jøssingfjorden in southwestern Norway and frees the 290 British seamen held aboard. February – The last mounted charge by a British cavalry regiment is made when the Royal Scots Greys are called to quell Arab rioters in Mandatory Palestine. 26 January – British battleship is torpedoed by a U-boat but suffers only minor damage. March – Frisch–Peierls memorandum: Otto Frisch and Rudolf Peierls, at this time working at the University of Birmingham, calculate that an atomic bomb could be produced using very much less enriched uranium than has previously been supposed, making it a practical proposition. 3–9 March – makes her maiden voyage from Clydebank to New York. 11 March – Rationing of meat introduced. 13 March – Indian nationalist Udham Singh assassinates Sir Michael O'Dwyer (in revenge for the 1919 Jallianwala Bagh massacre) at Caxton Hall in London, for which he is hanged on 31 July at HM Prison Pentonville. 16 March – First civilian casualty of bombing in the UK, on Orkney. 18 March – Last terrorist bomb in the Irish Republican Army's S-Plan campaign on the British mainland (and until 1973) explodes harmlessly on a London rubbish dump. 21 March – Old Age and Widows' Pensions Act reduces the pensionable age for insured women and the wives of pensioned men from 65 to 60. 29 March – A metallic security thread is added to £1 notes to prevent forgeries. 31 March – 33 fascist sympathisers are interned. 1 April – British Overseas Airways Corporation begins operation as a single company. 5 April – Neville Chamberlain declares in a public speech that Hitler has "missed the bus". 9 April – British campaign in Norway commences following Operation Weserübung, the German invasion of neutral Denmark and Norway. 10 April – MAUD Committee first convened to consider the feasibility of an atomic bomb. 12–13 April – British occupation of the Faroe Islands, following the German invasion of Denmark, to avert a possible German occupation of the islands. 23 April – The War Budget sees the introduction of Purchase Tax and an increase in tobacco duties. 2 May – Last British and French troops evacuated from Norway following failure in the Norwegian Campaign. 7–9 May – Norway Debate in the House of Commons. Strong opposition to the Chamberlain ministry's conduct of the war make it impossible for him to continue as Prime Minister. 9 May In private discussions, Viscount Halifax rules himself out as successor to Chamberlain in favour of Winston Churchill. Guy Lloyd wins the East Renfrewshire by-election for the Unionist Party (Scotland). 10 May Neville Chamberlain resigns as Prime Minister, and is replaced this evening by Winston Churchill with a coalition war ministry. German invasion of France and the Low Countries, ending the "phoney war". British Invasion of Iceland, following the German invasion of Denmark and Norway, to avert a possible German occupation of the island, in violation of Iceland's neutrality. 13 May Winston Churchill makes his famous "I have nothing to offer you but blood, toil, tears, and sweat" speech to the House of Commons. Whit Monday is officially not observed as a bank holiday. 13–14 May – Queen Wilhelmina of the Netherlands and her government are evacuated to London using HMS Hereward following the German invasion of the Low Countries. 14 May – Recruitment begins for a home defence force – the Local Defence Volunteers, renamed as the Home Guard from 23 July. 16 May – Large-scale alien internment begins. 22 May – Parliament passes the Emergency Powers (Defence) Act 1940, giving the government full control over all persons and property. 23 May Parliament passes the Treachery Act 1940 to facilitate the prosecution and execution of enemy spies. British Union of Fascists leader Oswald Mosley and antisemitic MP Archibald Maule Ramsay are arrested and interned (until 1943 and 1944 respectively), under terms of an enhanced Defence Regulation 18B, in London prisons. 24 May – Anglo-French Supreme War Council decides to withdraw all forces under its control from Norway. 26 May–4 June – The Dunkirk evacuation of British Expeditionary Force takes place. 300,000 troops are evacuated from France to England.

28 May – May 1940 War Cabinet Crisis: Churchill wins the War Cabinet round to his view that there should be no peace negotiations with Hitler, contrary to the view of his Foreign Secretary, Viscount Halifax. 2 June – Secretary of State for War Anthony Eden gives a radio address claiming success of the Dunkirk evacuation. 4 June – Churchill makes his We shall fight on the beaches speech to the House of Commons. 5 June – Novelist J. B. Priestley broadcasts his first Sunday evening radio Postscript, "An Excursion to Hell", on the BBC Home Service, marking the role of the pleasure steamers in the Dunkirk evacuation. 7 June – King Haakon VII of Norway and his government are evacuated to London on HMS Devonshire. 9 June – The Commandos are created. 10 June – Italy declares war on France and the United Kingdom. 11 June – The Western Desert campaign opens with British forces crossing the Frontier Wire into Italian Libya. 12 June – Over 10,000 soldiers of the 51st (Highland) Division under General Victor Fortune surrender to Rommel at Saint-Valery-en-Caux. 16 June – The Churchill war ministry offers a Franco-British Union (inspired by Jean Monnet) to Paul Reynaud, Prime Minister of France, in the hope of preventing France from agreeing to an armistice with Nazi Germany, but Reynaud resigns when his own cabinet refuses to accept it. 17 June – , serving as a troopship, is bombed and sunk by the Luftwaffe while evacuating British troops and nationals from Saint-Nazaire with the loss of at least 4,000 lives, the largest single UK loss in any World War II event, immediate news of which is suppressed in the British press. Destroyer rescues around 600. 18 June Churchill makes his Battle of Britain speech to the House of Commons: "...the Battle of France is over. The Battle of Britain is about to begin... if the British Empire and its Commonwealth last for a thousand years, men will still say, This was their finest hour." He repeats the speech on BBC radio this evening. The Ministry of Information issues more than 14 million copies of an advisory leaflet If the Invader Comes. Appeal of 18 June: General Charles de Gaulle, de facto leader of the Free French Forces, makes his first broadcast appeal over Radio Londres from London, rallying French Resistance. 23 June – BBC Forces Programme begins broadcasting Music While You Work. 24 June–1 July – Operation Fish: Royal Navy cruiser sails from Greenock in convoy to Halifax, Nova Scotia, carrying a large part of the gold reserves of the United Kingdom and securities for safe keeping in Canada. Another convoy sets sail on 5 July from the Clyde, including HMS Batory, carrying cargo worth $1.7 billion, the largest movement of wealth in history. 30 June – German forces land in Guernsey, start of the 5-year Occupation of the Channel Islands. 1 July – First Luftwaffe daylight bombing raid on mainland Britain at Wick, Caithness: 15 civilians, 8 of them children, are killed. 2 July – British-owned , carrying civilian internees and POWs of Italian and German origin from Liverpool to Canada, is torpedoed and sunk by off northwest Ireland with the loss of around 865 lives.

3 July Operation Catapult aims to take French navy ships into British control or destroy them to prevent them falling into German hands. Those in port at Plymouth and Portsmouth are boarded and in an attack on Mers-el-Kébir British naval units sink or seize ships of the French fleet anchored in the Algerian ports of Mers El Kébir and Oran. The following day, Vichy France breaks off diplomatic relations with Britain. Cardiff bombed for the first time. 10 July Battle of Britain air offensive of the German Luftwaffe against RAF Fighter Command begins. British Union of Fascists proscribed as an illegal organisation under the Treachery Act. 19 July Adolf Hitler makes a peace appeal ("appeal to reason") to Britain in an address to the Reichstag. BBC German-language broadcaster Sefton Delmer unofficially rejects it at once and Lord Halifax, British foreign minister, flatly rejects peace terms in a broadcast reply on 22 July. General Sir Alan Brooke is appointed Commander-in-Chief, Home Forces, in succession to General Ironside, ending the latter's emphasis on stop lines for defence. 22 July – Special Operations Executive formed to undertake espionage and sabotage in enemy-occupied countries. 9 August – Birmingham Blitz (Regenschirm): Heavy bombing of Birmingham begins. 13 August – Adlertag ("Eagle Day") strike on southern England occurs, starting the rapid escalation of the Battle of Britain. 18 August "The Hardest Day" in the Battle of Britain: both sides lose more aircraft combined on this day than at any other point during the campaign without the Luftwaffe achieving dominance over the RAF. The Duke of Windsor is installed as Governor of the Bahamas. 20 August – Churchill pays tribute in Parliament to the Royal Air Force fighter crews: "Never in the field of human conflict was so much owed by so many to so few." 22 August – Allied Forces Act 1940 gives authority for governments in exile in the UK to maintain their independent troops on British soil. 24 August First air raid on London takes place. Howard Florey and a team including Ernst Chain, Arthur Duncan Gardner, Norman Heatley, M. Jennings, J. Orr-Ewing and G. Sanders at the Sir William Dunn School of Pathology, University of Oxford, publish their laboratory results showing the in vivo bactericidal action of penicillin. They have also purified the drug. 26 August – RAF bombing of Berlin begins. 31 August – Texel Disaster: Two Royal Navy destroyers are sunk by running into a minefield off the coast of the occupied Netherlands with the loss of around 400 men, 300 of them dead.