1. The great clock at Westminster started keeping time on 31 May 1859. Strictly speaking, what is "Big Ben" the name of?

2. The Battle of Jutland began on 31 May 1916. Which British admiral remarked "There seems to be something wrong with our bloody ships today" after two of his battlecruisers blew up?

3. The Treaty of Vereeniging, signed on 31 May 1902, ended which war?

4. The Union of South Africa was formed on 31 May 1910. How many British colonies were united to create it?

5. RMS Titanic was launched on 31 May 1911. At which Belfast shipyard was she built?

6. Samuel Pepys made the last entry in his diary on 31 May 1669. Why did he stop writing it?

7. Joseph Haydn died in Vienna on 31 May 1809, while the city was occupied by French troops. A melody he wrote in 1797 is now the tune of which country's national anthem?

8. An American poet born on 31 May 1819 spent his life revising and expanding one collection of poems. What is it called?

9. An American actor and director born on 31 May 1930 asked "Do you feel lucky, punk?" as which San Francisco police inspector?

10. An American actress and model born on 31 May 1965 starred as a castaway in which 1980 film?

11. An Irish actor born in Dublin on 31 May 1976 played a hitman hiding out in a Belgian city in which 2008 black comedy?

12. An English actor born on 31 May 1922 played Marcus Brody, friend of which film hero?

13. 31 May is World No Tobacco Day. Which organisation created it?

14. On 31 May 1928, an Australian aviator set off from Oakland, California, in the "Southern Cross" on the first flight across the Pacific. Who was he?

15. The Confederation Bridge, one of the world's longest bridges over ice-covered water, opened on 31 May 1997. Which Canadian island does it link to the mainland?

16. A German Romantic writer born in Berlin on 31 May 1773 helped complete the classic German translation of the works of which playwright?

17. An American singer born on 31 May 1938 co-wrote "Puff, the Magic Dragon". In which folk trio did he sing?

18. An American actor born on 31 May 1949 played the scarred Sergeant Barnes in which 1986 Vietnam War film?

19. An American actress born on 31 May 1943 played Christine Cagney in a police drama series. Who played her partner, Mary Beth Lacey?

20. An American minister born on 31 May 1898 wrote a hugely popular 1952 self-help book. What was its title?