Wee Weasley Welshman,
But when you've waited 3 minutes to get a gap, are 4,000ft high, have made 5 attempts to establish contact but been stepped on every time, tried Identing to get attention and not succeeded THEN sometimes I'll just wedge in a "London XXX123 with you" type call. I don't know what else to do.
That's a fair call - it's just unfortunately what I mentioned happens regularly even when quiet. If the frequency is busy, don't worry, we do know you are there, however, it is understandable that you would like a verbal confirmation of your prescence.