Dan,
the reason why the FREE FISH Raffles are limited to only the US and Singapore now is that we have a big member base from each of the countries. If we see a huge influx of people from the UK then we would definitely look into something for the UK. Exporting a fish internationally takes a lot of paper work and hassle so it doesn't make much sense to ship the fish out. As for now the only contest is open world wide is the POTM.
Maybe if you can get more UK members to join MFK and post it could make the UK Free Fish thing become a reality sooner.