Yes, the legal tender status of the round £1 coin was removed on Sunday 15th October 2017. You can no longer spend your round £1 coins.
The round £1 coin has been replaced for the first time in over thirty years because of its vulnerability to sophisticated counterfeiters.
Approximately one in thirty round £1 coins in circulation was a counterfeit.
We introduced a new, highly secure coin on 28 March 2017 to reduce the costs of counterfeits to businesses and the taxpayer.
For more information on how to identify counterfeits of the round £1 coin please click here http://www.royalmint.com/discover/uk-coins/counterfeit-one-pound-coins