The fact of the matter is that the cost of 100 hours flying is about the same on both sides of the Atlantic in you live in the UK (may be slightly cheaper in the UK)
What's the cost at your place for 100 hours on a Cessna 150?
Include airport fees, gas to the airport, etc...
I'm sure you're very far from beating us on pricing!
I can acertain you that our pilots save at least 2K over what you are charging for 100 hours.
Solution:
You should try to change your line of marketing and I'm gonna help you on that, what I expect in return is for you to stop posting non-sense about uk being cheaper, because you know it's not.
Now, you have a clear advantage over US hour building but you are not using it. People don't need to take leave to hire your airplanes. People need to take leave to head to the US. Now focus on that and no one will dispute it, you can go on doing your marketing on this website and everyone will coexist peacefully. If I get requests from guys who can't take leave I can forward them to you (that's how you create partnerships!)
Try to make friends of your competitors.
Take example on the airlines and their alliances.