Landlord and Tenant Act 1954: Primary legislation governing the relationship between landlords and tenants in England and Wales, particularly for commercial leases. Contains provisions about security of tenure and termination procedures.

Law of Property Act 1925: Fundamental property law legislation that sets out basic principles of property ownership, leases, and legal interests in land in England and Wales.

Housing Act 1988: Key legislation for residential tenancies, defining grounds for possession and notice requirements for assured and assured shorthold tenancies.

Landlord and Tenant (Covenants) Act 1995: Legislation governing the enforcement of covenants in leases and the rights and obligations that pass between landlords and tenants.

Protection from Eviction Act 1977: Law protecting tenants from harassment and illegal eviction, setting out proper procedures for ending tenancies.

Common Law Notice Requirements: Legal principles established through case law regarding the proper service and validity of notices, including timing and delivery methods.

Original Lease Terms: The specific provisions in the original lease agreement including break clauses, notice periods, and termination conditions that must be considered.

Lease Classification: Whether the lease is commercial or residential, and whether it's fixed-term or periodic, as different rules apply to different types of leases.

Termination Grounds: The specific legal grounds being relied upon for the lease cancellation, which must be valid under the relevant legislation.

Security Deposit Regulations: Rules governing the return or deduction of security deposits upon lease termination, including any prescribed schemes or timeframes.