People who have £20 or £50 paper notes with the late Queen's face on them have just six days left to spend them.
The Bank of England has said that from Friday (September 30), these notes will be made redundant in order to tackle counterfeits. Despite the change looming, the BoE has urged the public not to change their money in a hurry.
The bank sent out a warning that long queues are already starting to form and people are expected to wait hours in some places. The public are able to swap their notes at any of their branches including the Post Office and other high street banks.