Australia's biggest bank is set to grow, with Commonwealth Bank of Australia to take over BankWest and St Andrew's Australia from their troubled UK-based parent, HBOS plc, for $2.1 billion.

Australia's biggest bank is set to grow, with Commonwealth Bank of Australia to take over BankWest and St Andrew's Australia from their troubled UK-based parent, HBOS plc, for $2.1 billion.