How do I convert my USDT to GBP?

Good afternoon, I am quite new to the world of cryptocurrencies and I am currently holding some USDT. I am interested in converting my USDT to GBP, but I am somewhat confused about the process. Could you please provide me with a step-by-step guide on how to convert my USDT to GBP? I would greatly appreciate it if you could also explain the potential risks and fees involved in this conversion. Thank you very much for your help!