at least 40 hours of
general flight time, of which at least 20 hours include training from an
authorized (read FAA qualified) instructor, and also included in the 40 hours is 10 hours of solo flight training in the AO listed in 61.107 - etc etc... FAR 61.109 (c) brakes it all down for you to read .. but basically you'd need to get 20 hours of instruction from an FAA instructor. Thats assuming UK training is similar to US training and you've done most of the stuff listed in above mentioned FAR in your UK PPL training.
As for the CPL - it also mentioneds a lot, but if you got the hours already, then again, all you basically need is an additional 20 hours of instruction from a US CFI.
so make that 40 hours total * USD 200 per hour to rent a helo = 8 G's
