FD Standby
The Facts
A DASH8 or ATP departed ahead of the A340 flying the same SID or intial routing for 3 miles before turning,this requires a time separation of at least 4mins.That is why the microlight departed with the A340 lined up .The same rules would have applied to the other Airbuses and the J41 was last in the quequ. Just ATC doing its job whether you are a m/light or A340