10 Most Valuable and Rarest Error Coins in Circulation

10. First World War Centenary Royal Navy £2 coin worth up to £10

9. Undated 20p coin worth up to £60

8. £2 coin with the Queen's head upside down worth up to £90

7. £1 coin with two dates worth up to £500

6. Silver 2p (1992 to 2018) worth up to £600

5. Bronze 20p worth up to £750

4. All zinc £2 coin worth up to £800

3. Silver 2p (1971 to 1992) worth up to £1,000

2. 1983 New Pence 2p coin worth up to £1,250

1. London 2012 Olympics Aquatics 50p first design worth up to £1,500