I have recently come up with an idea which I believe would be of interest to bookmakers who offer various luck games online. For example, many bookmakers offer various lottery/keno games, a hi-lo guessing game, perhaps a sport game (ie darts, guess whether the total will be above 60 or similar) etc. I have thought of a game that to my knowledge no bookmaker has come up with yet, and I believe would be a successful one - but I don't want to directly tell them the idea in case they steal it and create the game. What can I do to protect my idea, and what would be the associated costs with such a thing? I am from the UK. Thank you very much! I would just like to add that this game is not something completely new - it is just using a modification of a well-known game into a betting variant. For example, darts can be modified into a betting game by predicting the outcome of the 3 darts. It is comparable to that. So I don't know if this is considered an invention as such.