1) Major traditional banks in the UK vs. Online Banks
The biggest traditional banks in the UK are HSBC, Lloyds, Royal Bank of Scotland, Barclays, NatWest, Santander, Metrobank and Nationwide. By traditional, we mean banks with actual physical branches across the country.
Online bank accounts are great if you simply need to have an account in Pound Sterling with a UK account number and sort code, and many also offer debit cards.
Or login here if you have an account already.