As it is so unusual it has meant the coin has been dubbed the "holy grail" of change collecting making it much sought after. The 20p coin was highlighted on Instagram by Coin Collecting Wizard.

That's because you may have a rare coin lurking among the old silvers and coppers. There are 20p coins that could be worth £50 lurking in Brits' change – but do you have one? TikToker @ ...