CPL from UK CAA in USA

[B2N2]

Max, being dual rated has its advantages so it's a smart thing to do.
If you decide to go to the USA you need to do the following:

• Get a US certificate based on your PPL
• Airmen Certification - Verify the Authenticity of a Foreign License, Rating, or Medical Certification
• Do the Instrument rating FAA Part 141, that way you don't need 50 hrs XC prior
• Do your timebuilding on an IFR flightplan to gain IFR experience
• FAA CPL SE and CPL ME
• Make sure you have the JAA/EASA required 100 hrs PIC so log FAA PIC and JAA/EASA PIC seperately. Under FAA you can log PIC and dual at the same time if you are rated in the airplane, under JAA/EASA you cannot
• Go back to Europe and do the practical conversion there
• No need to go to a European certified FTO in the US
• Actually you would be better off avoiding most of them altogether.