Peak District drone trial aims to restore ash-hit woods

It is easy to hear 'drone seeding' and think this is mainly a tech story. It is really a woodland recovery story. Above Dovedale and Lathkill Dale in the Peak District, Natural England is testing whether drones can spread native tree seed into ravine woods damaged by ash dieback. That matters because these are not gentle slopes where teams can simply walk in and plant by hand. They are steep, rocky and difficult to reach safely. So the question behind the headlines is a practical one: when the usual way is risky, what else can we try?

First, the disease. Ash dieback is caused by a fungus that can weaken and kill ash trees. In places where ash is common, that loss can quickly change the woodland. More light reaches the ground, dead branches make work more hazardous, and the future mix of trees becomes uncertain. **What this means here:** ravine woodlands are hard to repair in a hurry. They sit on steep sides, often with rock outcrops and thin soils, so even basic conservation work can be slow and physically demanding. When ash declines in places like these, restoration has to be thoughtful as well as fast.

In this trial, specially designed drones spread a mix of native tree seeds over two plots of 0.75 hectares each, one at Dovedale and one at Lathkill Dale. Natural England says the seed mix includes field maple, wych elm, alder, small-leaved lime, birch, rowan, yew, goat willow, crab apple and holly. That list matters because the aim is not to replace lost ash with any available tree. It is to rebuild a mixed woodland, with different species doing different jobs. A more varied wood can support more wildlife, suit the site better and stand a better chance if another tree disease arrives later.

What makes this trial interesting is not only the aircraft but the idea behind them. Instead of planting every tree by hand, the drones spread seed in a way that tries to copy natural dispersal. If you want the simple version, they are doing what wind, gravity and healthy parent trees would usually do over time. There is also a clear safety reason. Natural England and the National Trust have already used traditional planting and seeding across the Peak District Dales, but some slopes are simply too risky or too cramped for people to work on by hand. In those places, a drone may be the safest way to give woodland recovery a start.

Natural England believes this is one of the first trials of its kind in a steep, compact ravine woodland setting. That is important because drone seeding has already been used in more open upland areas, including in the Scottish Highlands, but a wooded ravine is a harder test. The canopy is thicker, the ground is less visible and accuracy matters more. Quadrotor Services, the company involved in the work, says one priority was making sure seed could pass through the canopy and reach the woodland floor. The firm has previous reforestation experience in the Highlands, where seeds sown by drone at Allt Dubh in spring 2024 recorded a 2.7% germination rate against an expected 1%. In plain English, more seeds sprouted than the company had planned for. We should still be careful: a good result there does not prove the same result will happen in the Peak District.

Martin Evans, Natural England's woodland restoration manager, has framed the trial as a response to urgency as much as invention: ash dieback is moving through a precious habitat, and some of the ground is too steep for teams to reach safely. Adam Linnet, lead ranger for the National Trust in the White Peak, makes the wider case for getting this right. The trees in these ravines do more than make the dale look beautiful. They support wildlife, store carbon, help steady the ground and reduce erosion and flooding. **What it means for you:** when we talk about restoring woodland here, we are also talking about protecting soil, water and habitat at the same time.

Now comes the slower, less dramatic part. Trays have been set within and around the seeded areas to check how accurately the seed was spread, and one-metre-square plots will be monitored inside and outside the drone zones. By revisiting them several times a year, teams can track germination and sapling survival and compare the trial plots with control plots beyond the seeded ground. That gives the project something every sound science test needs: a comparison, not just a hopeful guess.

That follow-up matters because scattering seed is only step one. The project also wants to know whether drone seeding is cost-effective beside standard planting and hand seeding. A method can be clever and still fail if too few young trees survive. So the real measure of success is not simply 'Did the drones fly?' but 'Did enough young trees establish to make this worth doing again?' That is the useful lesson in this story. Technology gets attention, but restoration depends on what happens months and years later on the ground.

And this trial sits inside a much larger effort. The LIFE in the Ravines project, led by Natural England with Derbyshire Wildlife Trust, Staffordshire Wildlife Trust, the National Trust and Chatsworth Estate, has already planted more than 100,000 trees across the Peak District Dales to tackle ash dieback. That figure tells us something useful. Drones are not replacing people, nurseries or ordinary planting work. They are being tested as one extra tool for the hardest places. If the seed takes, the lesson may be a hopeful one: even in woods hit hard by disease and shaped by difficult ground, restoration does not have to stop at the edge of what we can reach on foot.