The FAA are the only ones that have given this serious consideration,the CAA will probably wake up to the fact when one buzzes them at Gatwick. so far the FAA have said that if you want to be a captain after the factory coarse you will need a helicopter ATP and a multi engined fix wing CPL.
If you only have a ATP(H)you will need 500 hrs on type before you can be a captain.
This may all change though as the project progresses,I know I will be getting mine!