The Bank of England has issued a warning to anyone who has £20 and £50 paper banknotes in their wallet or purse.
An estimated 163 million £50 notes and some 314 million £20 notes are thought to still be in circulation. But for those who still have the notes in their back pocket, there is only a limited amount of time to use them.
The bank has alerted people as they only have 100 days left to spend or deposit the bank notes as they will no longer be accepted as a form of payment. This comes has they are set to be replaced by more durable plastic versions which are also more difficult to counterfeit.
