Santander
I dont get the hate people have for the website however. Ive used lloyds, nat west, halifax and a few other smaller building societies and its certainly no worse and in a lot of cases better.
Again I rate them quite highly compared to the others on customer service and have had no issues, but then I am competent financially so do not fall into the pits and traps that people how rate banks badly seem to fall into.
The also offer pretty close to market leading products most of the time, decent interest rates on savings. ISAs, loans etc so they are by far easier to use if you want a simple bank to use. Historically Barclays, Nat west etc have offered terrible savings rates so you needed to use multiple banks/building societies in order to not be getting mugged on rates.