Last year I was flying with my family from Heathrow to Edinburgh with BA, and after we had boarded and settled down,I was asked if my 12 years old son would move and sit some distance away with 2 x UM girls. I was very impressed with the way it was handled by the cabin crew, who were obviously ill at ease about this regulation. On the plus side, my son was able to gain a visit to the flight deck as a result,( yes, he now wants to be an airline pilot!!!but hates girls even more!!) However, we really felt sorry for the poor guy who then had to move and sit with us, as he was very embarrassed. Couldn't this have been sorted out before we loaded, as the check-in-desk staff, I guess, were aware that there were two UM girls travelling?