Depletion of the British Historical Environment

Changes in the abundance of farmland birds between 1970 and 2021 in the UK (source, British Trust for Ornithology):

Richard Broughton 🇺🇦 @woodlandbirder · 12 g. New Woodland Bird Indicator shows worst ever result. Woodland specialists like Marsh Tit, Willow Tit, Spotted Flycatcher & Wood Warbler are nosediving. Interestingly, in past 20 yr specialists tended to dip if generalists went up, but now both declining. https://bto.org/our-science/publications/developing-bird-indicators

The historical environment is under similar pressure. With, now, 40000 metal detectorists currently thought to be active, the number of diagnostic metal artefacts remaining in accessible parts of the archaeological record probably looks like the lower two curves too. Birds have organizations like the British Trust for Ornithology and the archaeological record has... uh... ? Who is doing this public outreach, responsibly alerting the British public to the scale of the problem?