AlanM & WBSATCO - It is what I anticipated and you just confirmed hindsight thinking. It is I believe fortunate that we have have a very good system of ATC in the UK and are by and large quite tolerant of unintentional errors where no danger is involved. This does allow for mistakes to be made and lessons to be learned by all concerned without the fear of prosecution. I am sure I speak for the vast majority of pilots in expressing thanks to all ATC staff for the service provided when available.