Martin Crawford and the Agroforestry Research Trust (ART) have done pioneering work for decades on temperate climate food forestry and perennial polycultures. They’ve been leasing from a Trust 2 acres on which they’ve developed a research and demonstration food forest. The Trust gave ART notice of lease cancellation. ART needs public pressure to push the Trust to instead sell ART the land for long-term security for the food forest.
I consider most petitions to be useless, but this one is worth signing. It sounds like the Trust has been taken by surprise by the public attention. Petition · Stop the Destruction of the World-Renowned Dartington Forest Garden - United Kingdom · Change.org
For more background, and daily updates on the campaign, see https://www.agroforestry.co.uk/save-dartington-forest-garden/
There are also three email addresses for Dartington Trustees shared at those links, which folks can email to put on more pressure than just adding to the petition number. I got a rather defensive reply to my email, which suggests that the trustees are indeed feeling the pressure from the public.