The 20p piece is a rare “mule” coin dating from 2008, and fetched £90 at auction. The coin was minted without a date due to an error and quickly became a sought-after collector’s items.

A RARE 50p coin could be hiding in your change – and it might be worth a fortune. Collectors are desperate to track down a ...

To redeem a link, simply click on it. Doing so redirects you to the Coin Master app. Note that you’ll need to do this on the same phone, tablet, or other device where you’ve installed the app.