DB,
I don't pressure anyone to get off the runway.It's only that you can lose vortex spacing having got the correct gap,because the heli landing is so slow.
As ATC what do we then do? Land the light category through the vortex knowing that it was OK as the heli passed the localiser,but on touchdown it's way below what is legal.Send the fixed wing around.Complain to the heli operator,or get bigger gaps for that operator.
Well getting bigger gaps means more holding for the heli,and more moans.Sending fixed wings around dramatically increases radars work load.I have already mentioned it to our management.As for racking in something behind it.Sometimes you are struggling to get a landing clearance with a fixed wing 8 miles behind,when they have to vacate at E2 after 6.00pm on 16.
I don't really know the answer,but to start complaining to the controller about what the delay is when your SVFR is just inviting a phone the watch manager.