TENNIS coach Judy Murray went to purchase doughnuts in London - but her Scottish £10 note was rejected as it wasn't "British". 

Murray, mum of Scots sporting icon Andy, had tried to purchase two for £9 from Doughnut Time, but the staff wouldn't accept the cash. 

Tweeting a picture of her single doughnut after the transaction couldn't be completed in its intended entirety, Murray said: "When you go to pay £9 for 2 donuts (yes, really) in London and your £10 Bank of Scotland note is refused because 'we only take British ones'.

Her followers jumped to her defence, replying with Michael McIntyre's "legal tender" gag, and another saying: "I’d have left the Scottish note on counter and left. It’s legal tender so you’re not refusing to pay."

However, the Scottish notes, despite being approved by the UK Government, are not technically "legal tender". It is rare that everyday transactions require legal tender cash.

On, Martin Lewis says with regards to the distinction: "It simply means most people don't understand what legal tender is ... Bank of England notes are only legal tender in England and Wales, meaning there are no legal tender notes in Scotland at all."