The 3 heliports -- Vanguard, London Heliport and Royal London Hospital -- are being developed as separate projects (the Vanguard one being the first one to be released and is pretty much finished.
Vanguard should be out anytime soon with the other 2 coming out soon.
The scenery will be made available by Charity Scenery (a new developer) through a donation-ware system. The cost will be, at least £1 and all profit (for all the London scenery) goes towards the London Air Ambulance.
We're happy to be joining Charity Scenery on this new (and honorable) venture. More news soon.