What is the symbol for Wales? 16. What is the symbol of Northern Ireland? 17. What is the national costume of Scotland? 18. What is the national instrument of the Scots? 19. What is Edinburgh famous for? 20. What is the name of Wales? 21. When do English people celebrate Christmas? 22. What is traditional British Christmas food? 23. When did the Romans land in the British Isles? 24. What tribes invaded Britain in the 5th century? 25. Who came to Great Britain from Denmark and Norway in the 9th century?