In addition to Carby, the lender has also appointed Stuart Bernau, formerly retail director at Nationwide Building Society.
Former Conservative Party deputy chairman and Panmure Gordon director Howard Flight, Ben Gunn, previously chief executive of Friends Provident Life and Pensions and former Mastercard International chief executive and Midland Bank director Gene Lockhart.
The lender is believed to be very close to obtaining a licence from the regulator, having applied for one in early 2008.
It is hoped the licence will come through in time for the bank to launch in Q1 2010.
In an interview with The Daily Telegraph, Anthony Thomson, Metro’s vice-chairman, reveals that the bank intends to float on the stock market or conduct another private fundraising by its third year of trading.
It plans to initially open 20 branches, including sites in Borehamwood and Fulham Broadway this year, and eight more in 2011.
Metro envisages 200 branches, all in Greater London, by 2020, reports the Telegraph.