4. Non-natural (extraordinary and unusual) use of land
What is considered “non-natural” will vary depending on time and place
● Can include storage of natural material in a non-natural amount
○ Rylands v Fletcher (storage of large quantity of water in an artificial reservoir)
● A potentially dangerous activity, e.g. bulk storage of chemicals, will be considered non-natural
○ Cambridge Water v Eastern Counties Leather
● Modern approach is to consider whether D’s use of land was extraordinary or unusual
○ Transco v Stockport (domestic water supply was an ordinary use of land)