Housing Act 1988: Primary legislation governing residential tenancies in England and Wales. Defines different types of tenancies and occupancy rights, crucial for determining the legal status of unauthorized occupants.

Protection from Eviction Act 1977: Makes illegal eviction a criminal offense, requires proper notice periods, and prohibits harassment of occupants. Ensures evictions must follow proper legal process regardless of occupancy status.

Criminal Law Act 1977: Section 6 specifically makes it a criminal offense to use violence to secure entry to premises when someone is present and opposes entry. Critical for handling unauthorized occupants and squatters.

Prevention of Eviction Act 1964: Provides statutory protection for occupiers and establishes required procedures for lawful eviction, ensuring proper legal process is followed.

Torts (Interference with Goods) Act 1977: Governs the handling of any possessions left behind by unauthorized occupants and sets out legal procedures for dealing with abandoned goods.

Common Law Rights: Fundamental legal principles regarding trespass and property rights of the landowner, providing basic framework for property possession and eviction rights.