ANSWERS

1. 12

Two series of six episodes were made, in 1975 and 1979.

2. Nelson Mandela House

3. A Reliant (Reliant Regal Supervan)

4. Walmington-on-Sea

5. Wernham Hogg

6. Holly

7. HMP Slade

8. Craggy Island

9. "Bouquet"

10. Holmfirth

It ran for 37 years, from 1973 to 2010.

11. Rag-and-bone men

12. Barry

13. Nouvion

14. David Mitchell and Robert Webb

15. Victor Meldrew (in "One Foot in the Grave")

16. "Have you tried turning it off and on again?"

17. Sir Humphrey Appleby

18. Vienna

19. Surbiton

20. Rik, Vyvyan, Neil and Mike