DTI refers, in legal practice, to the former UK Department of Trade and Industry, a central government department (1970–2007) responsible for business, trade, energy, consumer protection and company law policy. It is a descriptive abbreviation, not a defined statutory term; legislation typically referred to “the Department of Trade and Industry” or “the Secretary of State for Trade and Industry”.
Following machinery-of-government changes, DTI functions moved to BERR and DIUS (2007), then to
bis (2009). In 2016, business and energy functions were combined in BEIS. In 2023, BEIS was replaced by the Department for Business and Trade (DBT), the Department for Energy Security and Net Zero (DESNZ) and the Department for Science, Innovation and Technology (DSIT). In practice, former DTI energy functions now sit with DESNZ and business/trade functions with DBT.
For statutory references, the Interpretation Act 1978 and transfer of functions orders generally treat references to the former department or Secretary of State as references to the current responsible office-holder. In contracts, policies and legacy guidance, read DTI as the appropriate successor department and verify the current scheme owner.
Usage is consistent across England & Wales, Scotland and Northern Ireland (reserved matters). In Ireland, “DTI” is not used; equivalent functions rest with...