On 12 February 1955, the imperial couple left the United States for the United Kingdom on the famous liner, the "Queen Mary". In London, Mohammad Reza and Soraya had dinner at Buckingham Palace with Queen Elizabeth II; the Prince Consort, Prince Philip, Duke of Edinburgh; the Prime Minister Sir Winston Churchill and the Foreign Secretary Sir Anthony Eden. In the final part of their trip, the imperial couple visited Cologne where they stayed with Soraya's parents. The Shah's daughter by his first marriage, Princess Shahnaz, who was studying in Belgium, also went to Cologne to see her father, which caused a jealous Soraya to throw what was called an "embarrassing tantrum", demanding that her husband show love only to her, which finally led to the Shah to tell her to shut up. On 12 March 1955, the Shah and the Queen returned to Tehran, where they were pleased that, despite the fact it was raining, thousands of people had come out to welcome them back. The Shah, who disliked his prime minister, General Fazlollah Zahedi, was well pleased that Zahedi who was suffering from gout was visibly uncomfortable standing out in the rain to welcome him back at the Tehran airport.