Admiral-Lord Mountevans rules are a set of professional wrestling rules mainly used in British wrestling. They were named after Edward Evans, 1st Baron Mountevans who ordered a unified set of rules written up for professional wrestling in the British Isles.
Professional wrestling in the United Kingdom, under the All In rules, had been popular in the 1930s. However, as a result of a shift in focus away from technical skill and towards violence including usage of weapons, it was banned towards the end of the decade by the London County Council.
After a failed attempt to relaunch the sport with a show at Harringay Arena, Middlesex in 1947 was condemned by journalists as being "fake", Admiral-Lord Mountevans along with radio personality Commander Archibald Bruce Campbell, Maurice Webb MP and Norman Morell, an Amateur wrestling champion and professional wrestling promoter, formed a committee to formalise professional wrestling in the United Kingdom and write up a set of unified rules.
Once the rules were written, they were almost universally accepted with 95% of promotions in the United Kingdom adopting them. In 1952, the rules were adopted by the newly formed Joint Promotions, officially as a way to uphold the committee's ideology but was also considered to be a way for Joint Promotions to effectively control British wrestling.
In London, the new rules led to the ban on professional wrestling being lifted however a by-law authorised by the Home Office and the Metropolitan Police kept female wrestling banned within the Greater London area until 1987.