Guidance for energy suppliers on how to apply discounts to domestic tariffs from 1 April 2026, related to the RO to Exchequer scheme and closure of the ECO and GBIS schemes.
Source
https://www.gov.uk/government/publications/domestic-energy-tariff-reductions-2026-guidance-for-energy-suppliersCanonical document at the regulator. Always cite this URL — not the Vantage detail page — in compliance evidence.