Above Grimwith reservoir’s sparkling blue waters in the Yorkshire Dales lies a habitat that the government describes as one of England’s “national rainforests”. It is a boggy moor, packed full of peat, soil so wet and rich with plant material that it may store more carbon, acre for acre, than tropical rainforest. 

But today the land is scorched dry and crunchy underfoot. Blackened spikes of dead foliage protrude upwards, embers from a recent fire. It was burned to encourage growth of the fresh young shoots of heather on which grouse like to feed – grouse which will later be killed by shooting parties.

The fire here was set in spite of – and in apparent contravention of – a partial ban on peatland burning introduced by the government last year, in the run-up to the Glasgow climate summit. 

We came here to test the peat depth, as part of a major investigation into the impact of this new ban. The government says its new rules are intended both to protect England’s blanket bogs – a delicate habitat of international importance – and to help the UK hit net zero carbon emissions by 2050. These peatlands are the biggest natural carbon store on UK land. Rotational burning dries the peat and erodes its ability to keep carbon locked out of the atmosphere and to provide protection against floods. But scientists and campaigners say the ban does not go far enough, is riddled with arbitrary loopholes, and will be too hard to police. 

So, when the burning season kicked off last October – the first since the introduction of the new ban – Unearthed set out to find what effect the new rules were having on England’s grouse moors. 

Satellite data

It is notoriously hard to track burning on grouse moors: it happens in remote locations, there is little concrete government data available, and enforcement often seems to depend on the honesty of landowners and the eyes of the public. 

In recent years, a growing movement of volunteers has been working to document the fires. Hikers, fell runners and activists report details of the burns they spot to campaign groups like Wild Moors, or to the RSPB. But these reports don’t always come with precise coordinates, making them hard to attribute to particular landowners. 

It is harder still to identify which burns might be in breach of the new regulations – the ban only prohibits burning on peat if it’s unlicenced, and if the peat is more than 40cm deep, and is in a site of special scientific interest (SSSI), and is protected by one of two other formal conservation regimes, and is on ground that is not too steep and rocky to mow. 

There is still an enormous amount of burning going on.

So to investigate the past burning season, Unearthed  developed a methodology that uses data from three satellite services – including satellites run by NASA and the European Space Agency – to find evidence of grouse moor fires. We worked with Greenpeace’s Global Mapping Hub to create a platform that overlays this evidence with government maps of England’s peat depth, conservation zones, habitats and land ownership. This was then cross-referenced against hundreds of eyewitness reports obtained by Wild Moors, a campaign group in Northern England.