150. Things likely to do mischief.

150.     Things likely to do mischief.

The rule in Rylands v Fletcher1 applies only to things likely to do mischief if they escape2. The requirement is not easily satisfied: there must be an exceptionally high risk of danger when judged by standards relevant to the particular place and time3. It creates a high threshold for claimants to overcome4. A wide variety of things have been held to come within the rule, for example water5, sewage6, fires deliberately made or brought on to the land7, gas8