It seems that's my advice helped you to find best solution, and even I am not from UK, based on the experiences of others who needed something similar, Binance Jersey is currently the best option for what your friends need. Now you only need to learn your friends how to secure their accounts to not become victims of phisning, or confused with BTC / BCH.
Thank you! For years I was using Localbitcoins and then Coinbase Pro, and I didn't need to change anything. Now I had to browse around and here it comes - Binance Jersey, a nice alternative to Coinbase.
Funny fact - Clearbank Limited they using, is the UK's first new clearing bank (wiki link) in more than 250 years. One of my banks refused to accept Faster Payment to them, I just gave them a call to let them know. They didn't update their sortcode tables yet or something like of that sort I guess (the UK has its own unique account + sortcode system).
Other bank processed payment immediately and it's now in it's way to Binance JE. I will post here on how that went with Binance.
In the meantime, today I had first meeting with my friend. Told her about Dollar Cost Averaging, shitcoin traps, BCH / BSV scams and faketoshi. Also about importance of wallet security. She will do well I am sure!