Lloyds were actually awful when I was with them (though I think now halifax and lloyds are the same company?)
I went about 50p overdrawn and they charged me about 30 quid, and kept adding 30 quid per day on for ages so the debt ended up being about a grand. They kept pestering me for this..I said I would pay the 50p that I owed but they were having none of it

So i left the 50p on the counter, and told them to piss right off and stop trying to rob me. This was 7 years ago, they still send me letters to this day but the debt is statute barred now
I would do the reclaim bank charges thing but I never paid them so theres nothing to reclaim..no chance of me paying that much for the sake of 50p