From the Official Website:
Labyrinthe is a high fantasy, deeply immersive Live Role-play (LRP) system staged with in our atmospheric chalk cave site in Chislehurst, Kent.
There are many LRP systems running throughout Great Britain, but Labyrinthe is the only LRP club in the country that runs multiple events almost every weekend of the year in an amazing warren of underground caverns and tunnels.
We offer an unrivalled opportunity for our hero players and their monster foes to take part in an extremely interactive and evolving game world, with its own highly developed cast of heroes and villains, all in an environment set aside and developed solely for their use. Over 20 years of experience and game-play has seen the game system and the in-character world of Labyrinthe and its players evolve to form a colourful land far from the day to day grind of 'real life', with a strong history and even stronger future. Here the actions of the players continue to have a direct and significant impact on the world around them, even to the extent of governing cities and armies.
What hero would be complete with out a foe to vanquish or villain to thwart? These villains come in the form of "monsters" played by other club members that volunteer their time to playing The Enemy. Monstering is a good way to get to know the system and caves, to practise your combat skills with out fear of harming your new characters but still be able to make new friends, and monstering also earns you "credits" (for our adult player) - essentially vouchers that can be used to discount the cost of playing on future events at Labyrinthe, reducing them to a minimal cost.