Hi -- You may as well claim the money back yourself saving you paying a firm to do it for you, this firm advertises no win no fee, but they charge you 25% excluding VAT of anything they get back for you.
Incidentally bank charges are on hold pending the high court test case that the OFT are challenging the banks with, although that does not stop you making a claim in the meantime.
http://www.cobleyjohnson.
com/bank_charges/index.php