One rare British coin can fetch £30,000 - have you got it in your loft?
At first glance, the so-called '1917 George V Gold Sovereign', minted during World War I, might seem fairly ordinary - but it's far from it ...
Rare gold Kew Gardens coin only released 15 years ago in UK is worth huge £7k
Kew Gardens 50p coin, featuring the Royal Botanical Gardens' Great Pagoda, tend to be valued at around £250 - but a rare gold ...