A rare 50p coin featuring Raymond Briggs' The Snowman could turn out to be a hidden treasure, as collectors are now willing to pay up to 1,500 times its original value. If you happen to have one ...

Of all the coins created to commemorate the 2012 Olympic Games, the 50p Football is among the rarest. It features an explanation of the controversial offside rule on it, with 1,125,000 produced.

A rare coin specialist has urged the public to keep an eye out for a specific Sir Isaac Newton 50p coin that might be worth considerably more than its nominal value ...