Campaigners are calling for full disclosure of Drax's tree consumption as MPs review subsidies received by the wood-burning power station.
Green campaigners believe that Drax should publish a key report by KPMG on its operations and sourcing to ensure transparency.
Drax, which is the biggest biomass power generator in the UK, has faced scrutiny for inaccuracies in data submission for subsidies and its use of wood from old-growth forests in the US.
Government plans include halving subsidies for biomass power generation post-2027, with concerns raised over environmental impacts and the need to transition to cleaner energy sources like wind and solar power.