Premium Bonds: How to check if you have won cash prize as December winners announced

Each Bond number, whether it has eight, nine, ten or eleven digits, has an equal chance of winning a prize, NS&I claims.

Millions of Premium Bond prizes are still unclaimed with more than 1,500 of them worth £1,000 or more.

This includes five prizes worth £100,000 and nine worth £50,000, according to research from MoneySavingExpert.

Winners of 11 prizes worth £25,000 have also yet to collect their money, while 37 prizes for £10,000 have still not been claimed, along with 69 prizes worth £5,000.