This week's edition of Energy weekly highlights includes: Ofgem’s consultations on the role of data domain co-ordinators in energy system digitalisation, new guidance related to RIIO-ET3 and proposed special licence conditions for Long Duration Energy Storage (LDES) projects in Window 1. In addition this week, the Plugs and Sockets etc (Safety) Regulations 1994 and Electricity Safety, Quality and Continuity Regulations 2002 (Amendment) Regulations 2026 have been enacted. These will bring into force changes outlined in the Department for Energy Security and Net Zero (DESNZ)’s consultation response, also issued this week, on the regulatory framework for plug-in solar panels. Other legislative developments include the publication of the Taxation (Energy and Vehicles) Act 2026, which will increase energy-related taxes, and various regulations relating to the Capacity Market (following updates to the Capacity Market Rules earlier this week), offshore oil and gas, assimilated legislation affecting nuclear projects and the UK Carbon Border Adjustment Mechanism (UK CBAM). The Prime Minister’s Office, DESNZ and HM Treasury have also announced the removal of VAT from domestic energy bills for the 2026/27 financial year from 1 October 2026, with consequences for commercial and industrial energy market players.