Is USDT allowed in UK?

Excuse me, I'm a bit confused about the regulations regarding cryptocurrencies in the UK. I understand that different countries have varying laws and policies towards digital currencies, and I'm particularly interested in USDT, which is a stablecoin pegged to the US dollar. Could you please clarify if USDT is allowed in the UK? If so, are there any specific regulations or restrictions that I should be aware of? Thank you for your help.