Well, I'm going to have a look in January. I'll be happy to report back too.
Working for a smaller airline I have less choice of subsidised travel. Getting to New York or Miami is not a problem but would appreciate suggestions on getting some kind of subsidised flight from there to Grand Cayman. A search on ba.com didn't reveal anything under a grand (GBP).
I think that if you are going to try and get UK or European citizens interested who don't have easy access to subsidised airfares you will need to look into solutions to getting to and from Grand Cayman at a reasonable price.