Experienced and well-travelled keeper who moved to Fratton Park in the summer of 2010 after his deal with Oldham came to a close.
Flahavan has been operating on a month-to-month contract after Steve Cotterill opted to make him understudy to Jamie Ashdown.
The 32-year-old has picked up a wealth of experience in a career that has seen plenty of stop-offs around the Football League.
The likeable keeper is the brother of former Blues favourite Aaron - who was tragically killed in a car accident in 2001.
Former clubs: Southampton, Woking, Southend, Crystal Palace, Leeds, Oldham
Date of birth: November, 28 1978
Height: 5ft 10in