The United Kingdom might be one of the European countries with more success in the trading of cryptocurrency, but the chances for offering reliable markets based there are yet to be confirmed. Currently, this country has access to a digital market called Ukex, a service that became global with time. It permitted the trading of GBP as a fiat coin representing the opportunities of hybrid trading. Nevertheless, the market stopped being optional and is now marked as "I tracked listing" by the official content provider, the CoinmarketCap.
The page still offers access, but the information of the exchanged was reduced to simple trading windows from union servers. The site might have been sold to other providers because most of the content available there is in Chinese, and there is no way of translating the content into the English language.
This market, equally, used to receive support from real banking provider like Visa. They are still mentioned on the web page. However, if you look for the copyrights of the company you can see they haven't received updates since 2020. They had just two years of services and then went down.
I must conclude by saying this platform is no longer available for trading. If you enter your data or even assets there you might be conscious that you can face loses. So, the best option is just to think of this site as an old development now living into memories of the market.