“maximum take-off mass”

1. The Air Navigation Order 2016 SI
2. Commission Delegated Regulation (EU) 2019/945 of 12 March 2019 on unmanned aircraft systems and on third-country operators of unmanned aircraft systems EU regulation
3. Commission Implementing Regulation (EU) 2019/947 of 24 May 2019 on the rules and procedures for the operation of unmanned aircraft (Text with EEA relevance) EU regulation
4. The Unmanned Aircraft (Offences and Consequential Amendments) Regulations 2025 SI

Definitions are taken from the instruments as published on zoomLaw, for guidance only. Check the instrument itself for its scope and any amendments.