There are also specific departure separations that can be applied with departing aircraft where no vortex wake separation is required, (these are procedural separations)
I'm doing this from memory, so if someone out there has a pt1 handy they can correct me where I go wrong:
1 minute - if tracks diverge by at least 45 degrees immediately after take off
2 minutes - if first aircraft is 40 kts faster than the following and neither is allowed to execute any turns that will decrease this 2 minutes
5 minutes - If first a/c is 20kts faster than the following
10 minutes - all other cases
There is another 5 minute separation which involves tracks diverging by 30 degrees and other separation being applied but I can't remember the exact details
At EGPF I've seen a controller get 3 IFR departures away in the same minute, that would be 36 in 12 minutes and who says the controllers at LL are the best
