So you don't think these casinos are breaking any laws?
Then wonder why they are not in court all the time if they don't follow their legislations in Curacao or where ever they operate... Why they should give a shite about anything in UK legislation or regulations, they don't operate in UK are they?
It sounds really great professional legal advise to always (doesn't matter where you are) just refer what your legislation back home says. Don't get surprised if you get fine from police officer when riding left side with your car in many countries.
There have been casinos from Curacato, Costa Rica and many other places operating quite a long time, you have great chance to stad up and make yourself rich and famous by stopping them operating. Maybe at same time force Vegas landbased casinos to follow £2 max bet rule in their slot machines for all player from UK.