This Practice Note sets out the UK’s regulatory framework for electronic communications, also known as telecommunications (telecoms), addressing the question of which services are regulated and, if so, what regulation applies. In the UK, the regulatory regime is primarily based on the Communications Act 2003, the Wireless Telegraphy Act 2006, Ofcom’s General Conditions of Entitlement, and Ofcom’s associated regulatory functions and powers. This Practice Note sets out these key elements of regulation and explains how and when they apply.