Having just recently reclaimed all of my charges I received a letter from my bank stating that whilst they wouldnt close my account if I continued to accrue charges they would give me a very basic account instead i.e no overdraft facility no switch card etc, it is very doubtfult they would close your account if you settle out of court, however I would agree to go on consumer action group website as this is very helpful and is where I used all the letter templates etc to start claiming.
hope this helps and good luck