ANSWERS

1. 1918 (on 1 April)

2. The Royal Navy

3. Bootnecks

4. David Stirling

5. Special Boat Service

6. The Crimean War (from guns captured at Sevastopol)

Research has suggested the metal actually comes from Chinese-made guns, possibly captured during the Crimean War, though the tradition remains.

7. 11

8. The kukri

9. HMS Queen Elizabeth

Her sister ship, HMS Prince of Wales, is the same size.

10. The BAE Systems Hawk

11. Dartmouth (Britannia Royal Naval College)

12. New York

13. Semper Fidelis

14. Field Marshal

15. Captain

16. Tommy Atkins

17. The Hurricane

There were more Hurricanes than Spitfires in service, and they shot down more aircraft, although the Spitfire became the more famous symbol of the battle.

18. The Bundeswehr

19. The Swiss Guard (the Pontifical Swiss Guard)

20. Charles II