Midland Bank Plc was one of the Big Four banking groups in the United Kingdom for most of the 20th century. It is now part of HSBC. The bank was founded as the Birmingham and Midland Bank in Union Street, Birmingham, England in August 1836. It expanded in the Midlands, absorbing many local banks, and merged with the Central Bank of London Ltd in 1891, becoming the London City and Midland Bank. After a period of nationwide expansion, including the acquisition of many smaller banks, the name Midland Bank Ltd was adopted in 1923. By 1934 it was the largest deposit bank in the world. It was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index but in 1992 it was taken over by HSBC Holdings plc.
info gleaned from Wikipedia