When this currency expires, the Bank of China can exchange it.
The Bank of China can exchange foreign currency, usually only British banknotes, coins are not accepted. Different exchange institutions may have different expiration dates. Most banks and exchange institutions do not have an expiration date for GBP exchange, which means you can hold GBP for a long time without worrying about expiration.
Some special types of GBP redemptions, such as promotions or redemption coupons from specific merchants, may have an expiration date set and expire after that. Please consult bank staff for details.