Lorien Trust (sometimes abbreviated to LT) is the trading name of Merlinroute ltd., a Live Action Role-Play organisation that runs LARP events at Locko Park, Derby, UK. It runs some of Britain's largest Live Roleplay events, attracting around 1,200 to 1,500 to its first three events each year and around 2,500 to 3,000 people to The Gathering. It was formed in 1992, originally as a charitable organisation (hence "Trust" in the name). In 1995 it became Merlinroute ltd trading as Lorien Trust. The Lorien Trust has a well established game world, and uses its own set of LARP rules, known simply as the "Lorien Trust rules system". In addition to the four events held per year, the Lorien Trust also sanctions many smaller events to use the same system and game world.