Question: Who escaped to London in 1940, along with his prewar government, where they acted as a government in exile?
Context: Hubert Marie Eugène Pierlot (23 December 1883 – 13 December 1963) was a Belgian politician and 32nd Prime Minister of Belgium, serving between 1939 and 1945.  Pierlot, a lawyer and jurist, served in World War I before entering politics in the 1920s.  A member of the Catholic Party, Pierlot became Prime Minister in 1939, shortly before Belgium entered World War II.  In this capacity, he headed the Belgian government in exile, first from France and later Britain, while Belgium was under German occupation.  During the German invasion of Belgium in May 1940, a violent disagreement broke out between Pierlot and King Leopold III over whether the King should follow the orders of his ministers and go into exile or surrender to the German Army.  Pierlot considered Leopold's subsequent surrender a breach of the Constitution and encouraged the parliament to declare Leopold unfit to reign.  The confrontation provoked a lasting animosity between Pierlot and other conservatives, who supported the King's position and considered the government's exile to be cowardly. The direct involvement of the Netherlands in World War II began with its invasion by Nazi Germany on 10 May 1940.  The Netherlands had proclaimed neutrality when war broke out in September 1939, just as it had in World War I, but Adolf Hitler ordered it to be invaded anyway.  On 15 May 1940, one day after the bombing of Rotterdam, the Dutch forces surrendered.  The Dutch government and the royal family escaped and went into exile in London. The Polish population transfers in 1944–46 from the eastern half of prewar Poland (also known as the expulsions of Poles from the Kresy macroregion), refer to the forced migrations of Poles towards the end – and in the aftermath – of World War II.  Similar policy, enforced by the Soviet Union between 1939 and 1941, targeted ethnic Poles residing in the Soviet zone of occupation in the aftermath of the Nazi-Soviet invasion of Poland.  The second wave of expulsions resulted from the retaking of Poland by the Red Army during the Soviet counter-offensive and subsequent territorial shift ratified by the Allies.  The postwar population transfers targeting Polish nationals were part of an official Soviet policy which affected over a million Polish citizens removed in stages from the Polish areas annexed by the Soviet Union.  After the war, following Soviet demands laid out during the Tehran Conference of 1943, the Kresy macroregion was formally incorporated into the Ukrainian, Belarusian and Lithuanian Republics of the Soviet Union as agreed at the Potsdam Conference of 1945 to which the acting Government of the Republic of Poland in exile was not invited. The Dutch government in exile (Dutch: "Nederlandse regering in ballingschap" ), also known as the London Cabinet (Dutch: "Londens cabinet" ) was the government in exile of the Netherlands, headed by Queen Wilhelmina, that evacuated to London after the German invasion of the country during World War II on 10 May 1940. Haakon VII (] ; born Christian Frederik Carl Georg Valdemar Axel; 3 August 187221 September 1957), known as Prince Carl of Denmark until 1905, was a Danish prince who became the first king of Norway after the 1905 dissolution of the union with Sweden.  He reigned from November 1905 until his death in September 1957. Tseten Samdup Chhoekyapa is an official of the Tibetan Government in Exile.  He is the Representative of the Dalai Lama and the Tibetan Government in Exile for Central and Eastern Europe and the head of the Tibet Bureau in Geneva.  He was appointed as Representative on 1 April 2008, succeeding Kelsang Gyaltsen.  He has previously worked for the Tibetan exile government in India and London.  He is a graduate of Columbia University in New York, and was born in Nepal after his parents had escaped from Tibet in 1959, after the Incorporation of Tibet into the People's Republic of China. The German occupation of Norway began on 9 April 1940 after German forces invaded the neutral Scandinavian country of Norway.  Conventional armed resistance to the German invasion ended on 10 June 1940 and the Germans then controlled Norway until the capitulation of German forces in Europe on May 8/9, 1945.  Throughout this period, Norway was continuously occupied by the "Wehrmacht".  Civil rule was effectively assumed by the "Reichskommissariat Norwegen" (Reich Commissariat of Norway), which acted in collaboration with a pro-German puppet government, while the Norwegian King and prewar government escaped to London, where they acted as a government in exile.  This period of military occupation is in Norway referred to as the "war years" or "occupation period". The Belgian government in London (French: "Gouvernement belge à Londres" , Dutch: "Belgische regering in Londen" ), also known as the Pierlot IV Government, was the government in exile of Belgium between October 1940 and September 1944 during World War II.  The government was tripartite, involving ministers from the Catholic, Liberal and Labour Parties.  After the invasion of Belgium by Nazi Germany in May 1940, the Belgian government, under Prime Minister Hubert Pierlot, fled first to Bordeaux in France and then to London, where it established itself as the only legitimate representation of Belgium to the Allies. The Luxembourgish government in exile (Luxembourgish: "Lëtzebuerger Exilregierung" , French: "Gouvernement en exil luxembourgois" , German: "Luxemburgische Exilregierung" ), also known as the Luxembourgish government in London, was the government in exile of Luxembourg during the Second World War.  The government was based in London between 1940 and 1944, while Luxembourg was occupied by Nazi Germany.  It was led by Pierre Dupong, and also included three other Ministers.  The head of state, Grand Duchess Charlotte, also escaped from Luxembourg after the occupation.  The government was bipartite, including two members from both the Party of the Right (PD) and the Socialist Workers' Party (LSAP). The Escapees' Cross 1940–1945 (French: "Croix des Évadés 1940–1945" , Dutch: "Kruis der Ontsnapten 1940–1945" ) was a Belgian war service medal established on 25 February 1944 by the Belgian government in exile in London.  It was awarded to all Belgian citizens who, during World War II, escaped from occupied Belgium, from another occupied land or from Germany and that, following said escape, had proven their patriotism by joining and serving with a resistance group, or had been imprisoned for a minimum of three months following an act of patriotism, or for having travelled clandestinely to participate in a Belgian action aimed at promoting the war against the enemy.  Escaped prisoners of war could also be awarded the medal if they met this last criteria.
Answer: Haakon VII