I was with plusnet for almost 9 years, and they ok, but what do you mean by trusted? At the end of the day an ISP is a business and all they want is your money. You also have to look at what you want from an ISP, how much you want to pay, if you want to support one of the smaller ones that are more expensive or go from one of the larger ones that are cheaper.
Adrian
Desktop machines Mac mini pro with macOS Ventura, also pc Ryzen powered with windows something or other.
Zooming with Zzoomm FTTP,