Well I never........
Never knew this.
1p coins are only legal tender for amounts up to 20p
2p coins are only legal tender for amounts up to 20p
5p coins are only legal tender for amounts up to £5
10p coins are only legal tender for amounts up to £5
20p coins are only legal tender for amounts up to £10
50p coins are only legal tender for amounts up to £10
You learn something new everyday
