It was passed in order to protect "lawful visitors" in respect of dangers due to the state of the premises or things done or omitted to be done on the premises.
How to prove Occupiers Liability Act 1957:
Establish occupier (Wheat)
Occ. owes DOC? Lawful visitors? Contractually permitted to be on land? Invitee?
Occ. breaches DOC - reasonable steps taken?
Causation - 'but-for' test (Barnett)
Direct link between Occ., breach of DOC and C's injury.
Defences:
Consent
C has knowledge of risk
C exercises free choice
Voluntary acceptance of risk
2. Contributory Negligence (IMI v Jayes)
3. Warning Notices (Staples) - if premises extremely dangerous, signs not enough (Rae)