Lloyds Bank acquired a small interest in The National Bank in 1919. There was a steady substantial drain of New Zealand shareholdings to the National Bank of New Zealand overseas share register throughout the 1950s and early 1960s This situation continued until 1966, when Lloyds Bank purchased The National Bank outright. In 1967 National Bank and the Bank of New Zealand established joint data processing services operated by Databank Systems Limited. The other trading banks joined the now proven computer system and ownership of Databank the following year.