The product is a £20 banknote from 1991 with a printing error on the back, as shown in the photos. This English currency features the likeness of Queen Elizabeth II and is from the era of her reign. The note is uncertified and is a unique find for collectors of British banknotes, especially those interested in the Elizabeth II period. Please compare from the normal printing the second photo is the non error printing to this one. It’s in very good condition it’s been kept because of the error at rear. It will be sent in a strong envelope to protect it. Thank you.