• In 1920, Lord Inchcape of the P&O Steam Navigation Company, established the P&O Banking Corporation. The bank lasted only seven years.
• In 1920, the P&O Bank established a branch in Colombo, Ceylon, which it followed by establishing branches in Shanghai, Hong Kong, Singapore, and Canton.
• [Building No.28 along the Bund in Shanghai was the Glen Line Building. It also housed the P.& O. Banking Corporation.  [ http://www.talesofoldchina.com/shanghai/places/t-buil01.htm ]]
• In 1927, the Chartered Bank of India, Australia and China acquired 75% of the shares of the P&O Bank.
• By the fall of 1938 the Chartered Bank owned 80% of the shares of the P&O Bank. It was agreed that the Chartered Bank should acquire the remaining shares of the P&O Bank to reduces overhead expenses and avoid further competition between the two Banks. [M02]
• The P&O Bank finally disappeared ca 1939. [This last fact is a deduction, I need to verify date]

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On the web:

• P&O Banking Corporation