Law of Property Act 1925: Fundamental legislation governing property law, covering legal assignments, property rights, and requirements for written documents and deed execution

Landlord and Tenant Act 1927: Regulates provisions regarding improvements, compensation, and rights related to assignment and subletting in commercial leases

Landlord and Tenant Act 1954: Crucial legislation providing security of tenure for commercial tenants and procedures for contracting out of these provisions

Law of Property (Miscellaneous Provisions) Act 1989: Sets out formal requirements for valid execution of property documents and requirements for contracts to be in writing

Land Registration Act 2002: Governs the registration of land and property interests, including requirements and priority of interests

Stamp Duty Land Tax Act 2003: Covers tax implications and requirements for property assignments and transfers

Contracts (Rights of Third Parties) Act 1999: Legislation governing how third parties may enforce terms of a contract, relevant for assignment situations

Companies Act 2006: Contains specific requirements for execution of documents by companies and corporate entities

Common Law Principles: Important legal principles including privity of contract, doctrine of assignments, and requirements for landlord's reasonable consent

Land Registry Requirements: Regulatory requirements and prescribed forms for registering assignments at the Land Registry

RICS Guidelines: Professional standards and guidelines set by the Royal Institution of Chartered Surveyors for property transactions