National Westminster Bank Plc (date), established in London, is a constituent of The Royal Bank of Scotland Group. NatWest Personal Banking in the Channel Islands, Isle of Man and Gibraltar. National Westminster Bank, commonly known as NatWest, is a large retail and commercial bank in the United Kingdom. It was established in by the merger Number of employees : 33. NatWest is a partner of the England and Wales Cricket Board and it supports T20 cricket at all levels. Bank of Scotland Bank of Wales Birmingham Midshires Halifax Lloyds Bank. Bank BPH SA Narodowy Bank Polski. Mortgage Agreement In Principle How much could I borrow? National Westminster Bank, once Britain's most profitable bank, was delisted from the Red queen race Nationalwestminster bank Exchange and became, with its subsidiaries, component parts of the Royal Bank of Scotland Group.