It's mostly imported. Last time I ran the numbers I calculated that Drax would burn every tree in the UK within a year if limited to local wood. Supposedly it's sawmill waste: https://www.drax.com/sustainability/environment/#sourcing-su... that would otherwise be burned as waste: https://www.drax.com/sustainability/one-company-helped-trans...

Not everyone agrees: https://www.redpepper.org.uk/activists-are-taking-on-the-uks...