British banks have the ability to close accounts where they see fit - and it can be down to a number of reasons.
Banks are able to identify these accounts through third party databases and credit reference groups that gather information on people they suspect of illegal activities such as fraud or terrorism.
These databases monitor British customers and hand information over to banks so they can decide what to do if someone is deemed a "risk" regarding bad credit and those who could be a "risk" to the bank and its reputation.