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Brownsea Island Countryside Stewardship project

Pine trees in woodland with the sun shining through, on Brownsea Island, Dorset
Sun shining through pine trees on Brownsea Island | © National Trust Images / Chris Lacey

The Countryside Stewardship project is one of the largest in the island’s history, aiming to create better conditions for nature to thrive and provide a more sustainable future for the species dependent on Brownsea's varied habitat. Here you can find out more about the work being undertaken.

What is a Countryside Stewardship agreement?

Brownsea's Countryside Stewardship project is a five-year conservation initiative that's funded by Natural England. The scheme provides financial incentives for farmers, woodland owners, foresters and land managers to look after and improve the environment.

The work we're doing on Brownsea Island

Through this project, we aim to improve, expand and link up existing wildlife-rich areas of Brownsea, with a focus on improving the condition of heathland and woodland, and driving nature recovery for the species that live here.

What's happening and when?

Capital works including habitat management and track improvements began in September 2021 and were completed in January 2023. The remainder of the five-year project will focus on controlling regeneration of invasive species and additional habitat creation works. Species-rich grassland is also set to be better managed as part of the project.

Why have we undertaken the project?

Brownsea plays a crucial role as a haven for wildlife in Poole Harbour within the recently designated Purbeck Heaths National Nature Reserve (NNR) – the largest lowland heathland nature reserve in England – and that's very much been at the heart of this project.

Greater gains for nature can be made by working at a landscape scale in conjunction with neighbouring land managers, and here on Brownsea that includes working with our partners on the island and the neighbouring Purbeck portfolio, to make bigger, better and more joined up spaces and corridors for wildlife to flourish.

Land, outdoors and nature

Nationally, the Trust's Land Outdoors and Nature strategy has set out ambitious plans to help reverse the decline in wildlife on all the land in our care as we aim to create or restore 25,000 hectares of habitat by 2025 – the equivalent of more than 33,000 Premier League football pitches.

Heathland and woodland restoration on Brownsea as part of this project will count towards these ambitions.

The improvement works that have been carried out on Brownsea also represent the culmination of a long-held ambition to tackle and eradicate invasive species such as holm oak and rhododendron, inherited by the National Trust on Brownsea six decades ago.

Purple heather at Brownsea Island, Dorset
The Countryside Stewardship project includes the restoration of the island's heathland | © National Trust Images/John Millar
key facts

12.5 hectares

of invasive rhododendron's been removed

18.6 hectares

of heathland restoration undertaken

5.5 kilometres

of track has been upgraded for future conservation and visitor access

Where are we now?

Capital works are completed

All of the selected tree felling as part of the project has now been completed, creating open spaces that let in more light which will help the heather to grow and spread. 2,000 tonnes of timber has been taken off the island, and nearly all of the remaining stumps have been removed. This will ensure that nutrients aren’t added to the soil and will aid the regeneration of nutrient poor-loving heathland habitat

Continued maintenance will be needed to control bracken, rhododendron, and pine from returning. The remaining roots and branches have been scraped away exposing soil that has a good mixture of organic and mineral material.

Now that light is reaching the bare ground, small sprigs of heather are beginning to emerge, a sure sign that the project to create more wooded heath habitat is starting to work.


Over 4.000 tonnes of gravel was delivered to the island and most of the tracks have now been re-surfaced. This means getting round the island has beome easier, especially for our mobility vehicle the Squirrel shuttle and for the all terrain pushcahirs and wheelchairs.

Close-up of a silver-studded blue butterfly on the Great Orme in Wales
This project will provided crucial habitat for rare species such as the Silver-studded Blue butterfly | © National Trust Images/Derek Hatton

The importance of heathland

Heathland is a precious habitat, rarer than rainforest with more than 80 per cent of lowland heathland being lost since 1800. If not managed, it can be lost to dense areas of pioneer tree species like Scots pine and birch.

As well as being rich in biodiversity, heathlands store carbon, and contain among the hightest amounts of carbon per unit area of any habitat, with soil stocks of up to 374 tonnes per hectare. Protection of heathland habitat is therefore not only important for biodiversity, but the carbon stocks they hold, as both may have taken centuries to accumulate.

By avoiding clear felling in heathland restoration and undertaking selective thinning instead, we've been able to manage the landscape as part of this project to improve the priority heathland habitat and maintain carbon stocks.

'This management has already begun to show benefits to both woodland and heathland species, in supporting the spread of Brownsea’s unique wooded heath habitat. Longer term, it will ensure a continuing food supply from trees in better health, and with a varied age structure that will continue to contribute to the food supply of the population of red squirrels and wider biodiversity, well into the future.'

– Tim Hartley, Countryside Stewardship Project Manager and Lead Ranger, Brownsea Island

Protecting Brownsea's red squirrels

A red squirrel habitat assessment took place in 2019 and highlighted the benefits of selective woodland thinning in improving woodland health for red squirrels. Thinning not only allows for regeneration of younger trees and improves the ecological and structural diversity of woodland to ensure continuity into the future, but also creates more space in the canopy, enabling trees to form larger crowns and produce a larger yield of seeds as food.

We have many of the beneficial tree species already on the island: pedunculate (English) oaks, rowan, hawthorn and yew, as well as shrub layer species like bell and cross-leaved heathers, ling and gorse. But the thinning of tight pine stands, in conjunction with controlling invasive species, will mean we will start to see natural regeneration of these more beneficial, native species.

Red squirrel sitting on a fallen tree trunk on Brownsea Island, Dorset
Red squirrel on Brownsea Island | © National Trust Images/John Millar

How has the island changed?

Visitors returning to the island will be able to see the impact that the project has had here in places across the island. Areas that have had targeted tree works will appear more open, letting light into the woodland floor and while it is still early days, there's already some really promising signs of heathland regeneration as a result of the works.

Penelope Park down at the western end of the island is a good place to see the benefits that this conservation work will eventually bring and is a good example of a wooded heath habitat that's been created through similar management over the last 10 years.

You can learn more about the project by popping into the Visitor Centre or asking one of our team.

A red squirrel on Brownsea Island, Poole Harbour, Dorset


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Natural England is the government’s adviser for the natural environment in England. They help to protect and restore our natural world.

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