It is a matter of personal choice.
Personally, I agreed to pay the bank their reasonable costs in running my account so for all my claims I will deduct what I consider to be their reasonable costs (i.e. reasonable costs based on numerous discussions on this site, not just my own view). I think it is a matter of principle that the bank is allowed a reasonable sum and the law recognises this.
Ultimately, I am not going to stand infront of a District Judge, or any other, and say in all fairness that the bank should end up with nothing.
Perhaps to be strictly accurate, one would claim all charges and the bank would respond with a counter claim for their reasonable costs. Is that your line of thinking? I just think I am coming to this as an average Joe and part-time genius, but I am not expected to know every nuance of the law, just to do what is reasonable and fair.
Considering just for a minute, a bank account rather than a credit card; if your
overdraft facility gets rammed with unlawful
bank charges then ALL charges (other than the monthly account fee and charges that would have occurred anyway) after that point should be recovered. I suppose the nearest credit card equivalent would be to claim back ALL charges after an increased credit limit soaked up more penalty charges than the first limit could bear.