My wife's elderly Corsa automatic would not reverse. The HJ site directed me to FATE the Federation of Automatic Transmission Engineers of whom there are but a handful in UK. The nearest to me was Stephens in East Herts near Ware. A phone call and I was on my way for an immediate evaluation followed by a partial stripdown and repair to the box which had suffered a leaking seal and worn out reverse brake band. A few days later the vehicle was back on the road and my pocket reasonably lighter compared to what a main dealer would have charged.
The beauty of such real engineers as Bill and his son Jason is that you get to talk to the person who knows what he is doing rather than some dolly bird in a posh office with free coffee who isolates the customer from the shop floor.