if there is a requirement law for this i dont see many people taking any notice as far as the yards i have been in, some heaps are anywhere and everywhere
The law is about watercourses and foul drains (sewers). Te watercourse one is obvious (pollution) and the sewer is because of the risk of ammonia gas building up in a confined space and causing explosions. I think the BHS manual states that muck heaps should be as far as possible away from stables, but no specific distance is stated