London County and Westminster Bank
1909 the London and Westminster Bank amalgamated with London and County Banking Co to form London County and Westminster Bank. In order to effect the amalgamation London & County Banking Co was renamed London County & Westminster Bank and acquired the assets and business of London & Westminster Bank, which was then wound up. The combined bank had 307 branches.
1911 London County and Westminster Bank acquired the business of the failed Birkbeck Bank of London.
1917 Acquired Ulster Bank Ltd, which continued to operate separately.
1913 Opened a branch in Paris.
1918 Merged with Parr's Bank to form London County Westminster & Parr's Bank Ltd. It had 700 branches
1919 Acquired Nottingham and Nottinghamshire Banking Co
1921 Acquired Beckett and Co of Leeds and York
1923 Acquired Stilwell and Sons of London
1923 The bank's name was shortened to Westminster Bank Ltd.