Well getting the chief pilots of the helicopter companies to speak to Nats management and BAA as well is a good start.
I have mentioned some of these topics before to the higher levels of ATC and recieved very mixed reactions.From positive to downright hostile.So I have just crawled back under my stone.I think it needs a combination of spacing heli departures a little more,combined with ATC working more like the Heathrow,Gatwicks etc and you'll solve most of the problem.
The oil/heli companies have had 30 years of free for all.In the 80's the system(or lack of it) creaked,and it's creaking again.There is a max hourly movement rate,and we are trying to move 45mins worth into 10 mins.It just will not work.