RESULT!!
Thanks Huckster, sorry I didn't reply sooner!!
I recieved an official apology today in a letter which more or less said to draw a line under the subject & consider my account settled!!
Does this mean that my account was unenforceable? or does this mean that I had a legal case against them?
When I saw the dreaded Natwest fonted letter on my door mat I was expecting the worst but was totally speechless!!
I'm going for a celebration drink I think!!
Thanks again!!