Me too, pre-SMF. nats were happy at the time to turn a blind eye to it but didn't like it once their SMF was installed. Remember the fuss over the parallel Concordes? All consenting adults sensibly coordinating during an auspicious and spectacular occasion, yet those involved were seriously criticised because separation was 'lost' during parallel approaches, even with two complicit Concorde captains. Of course, the ATCO came off worst...