Same case here.
I drew down the mortgage in 2004. I have been in dispute with UB for years now about the tracker issue. They offered to put me back on tracker in 2015, but it was on a higher rate than the one I had left, so I was with the Ombudsman by the time the Examination started.
Got the letter putting me back on the correct tracker rate in Feb 2017. But no repayment yet. I get letters from them every three months, saying there's no update. Most recently, I got one on 23rd December. Got excited for a minute, with all the talk of the accounts which would be resolved by the end of Dec, but no....!