They may be allowed, but I doubt they would be made - LEs are not really available here and I guess there isn't much of a market with so few UK collectors. The only ones I have seen so far have either been the couple of Millennium issues (most of which were not designed for use on the tables) and a couple that commemorate the casinos themselves (such as the Rendezvous Brighton Marina 5th Birthday chip).

But you never know - if there is a casino exec who is interested enough, something may be produced!

Jason