It only affects deposits/withdrawals in pounds using a service called Paysafe. Binance must be arranging to start using a different service as they claim pound withdrawals will restart on May 22.
https://www.theregister.com/2023/03/15/binance_deposits_withdrawals_uk/all customers will be unable to deposit or withdraw their crypto in pounds from May 22.
Paysafe and Binance both noted that other forms of deposits for UK customers are and will remain available.