Woodland carbon and productive forestry: how the Woodland Carbon Code works in practice

The Woodland Carbon Code has been part of the UK’s land use landscape for 15 years. I have been involved in its development and governance since it was introduced, nearly 20 years ago.

It was created to help bring private finance into woodland creation, while maintaining the high standards expected of a high quality carbon scheme. At the time of its introduction, the domestic woodland carbon market could have been described as the 'wild west', and was suffering serious criticism in the media.

Interest in carbon markets and domestic timber is growing. Along with that interest come questions about what kind of woodland the code supports, particularly whether it supports productive and commercial forestry. These are fair questions. Woodland creation involves long-term investment, a mix of public grants and private finance, and a regulatory framework designed to protect environmental standards.

What is additionality and why does it matter?

At the heart of the code is a principle called additionality. This means that carbon units must represent a genuine reduction in atmospheric carbon dioxide, one that would not have happened without carbon finance.

The code applies 2 tests:

• legal additionality – there must be no legal requirement to create the woodland
• financial additionality – the woodland creation must not already make financial sense without carbon income

For commercial forestry, financial additionality is often the most important consideration. If a productive woodland would be viable through timber income and public grants alone, then issuing carbon units for it would undermine the credibility of the carbon credit and the scheme itself.

This discipline is precisely why the code has become a respected and robust scheme. It’s the first government‑run carbon standard to reach the full assessment process of the Integrity Council for the Voluntary Carbon Market, a body that assesses the quality of carbon credit schemes worldwide. Weakening the financial additionality test would put this credibility, and the code’s support for productive forestry, at risk. Some within the commercial forestry sector feel that it is 'stacked' against them. The grant figures later show why that’s not the case, and what it takes to pass it.

Productive forestry in context

People often assume that commercial plantations dominate England’s woodland. In reality, they don’t. Conifers currently make up around 23% of England’s woodland area, down from about 28% in 2010.¹ This is reflected in the 50‑year softwood availability forecast, meaning the UK may have less home-grown softwood in future, at a time when global demand for timber is expected to rise sharply.

Since 2000, England has created 85,690 hectares of new woodland. Of that, only 6,140 hectares is conifer.² That gap is often overlooked.

Given this, supporting a domestic supply of both timber and carbon is strategically important. The real challenge is not whether we should support productive forestry but how to make sure carbon finance goes only to projects that genuinely need it.

Grants and financial additionality

The way woodland creation grants and carbon finance interact is often misunderstood, especially for productive or conifer‑dominated schemes.

Woodland creation grants are more generous in England than in Scotland and Wales, reflecting England’s economic situation and the value of land. For example, the England Woodland Creation Offer provides:

• capital payments covering 100% of establishment costs
• additional targeted payments for delivering public benefits
• annual maintenance payments for 15 years

On poorer land, and with fast‑growing species such as Sitka spruce, it can be difficult to show that the woodland wouldn’t be planted without carbon finance. Because of this, the code limits how much grant a project can claim. This is based on a transparent cashflow assessment that considers:

• woodland grant (and other) income
• land quality and forgone agricultural income
• establishment and management costs
• expected timber income, based on species and yield class (a measure of how fast a tree species grows)

This transparent process also means third-party validators can scrutinise projects without having to pick through endless financial models and statements.

A project can always pass the financial additionality test; where the level of grant support would otherwise prevent a project from passing the financial additionality test, accepting a lower grant will enable it to pass. The appropriate combination of public funding, carbon finance and private investment will depend on the economics of the individual project. This makes sure carbon finance goes where it makes a real difference, without replacing investment that would have happened anyway.

Illustrative grant outcomes by woodland type

The table below shows how much grant a 100‑hectare woodland creation project in England could claim, per hectare, depending on land quality and species mix, while still passing the financial additionality test. These figures assume mid-range establishment costs.

Woodland type	Species composition (by area)	Eligible grant (£/ha) poor land quality*	Eligible grant (£/ha) good land quality*
Commercial	65% Sitka spruce, 20% other conifers, 5% native broadleaves, 10% open ground	£2,000	£7,000
Commercial	80% Douglas fir or other productive conifer, 5% native broadleaves, 10% open ground	£10,000	£12,000
Mixed	50% Sitka spruce, 40% native broadleaves, 10% open ground	£6,000	£10,000
Mixed	50% Douglas fir or other conifer, 40% native broadleaves, 10% open ground	£10,000	£15,000

^*Good land quality is defined as Agricultural Land Classification grades 1, 2 and 3; poor is defined as grades 4 and 5.

These figures make an important point: productive woodland is supported, but grant levels and carbon finance must reflect its underlying economics. Designing a scheme to maximise short‑term grant income won’t always give you the best long‑term woodland value or timber returns.

Sitka spruce, as the mainstay of the commercial timber sector, generally grows faster and has a shorter rotation than other conifers, so it’s treated differently in the financial additionality test. Even in a woodland managed for timber, adding a wider mix of species can significantly affect the level of grant you can claim, while still passing the test. Diversifying the species mix will also make the woodland more resilient to the effects of climate change and to pest and diseases.

Getting consent and funding without delay

Creating a new woodland in the UK is regulated to meet Environmental Impact Assessment regulations and the requirements of the UK Forestry Standard. The Forestry Commission bases consent decisions on evidence, not simply on the number of objections received. We’ve published maps showing areas with no known sensitivities for woodland creation, which can help you choose planting sites where getting consent should be more straightforward.

You can get funding through the Woodland Creation Planning Grant to help develop compliant well‑designed proposals. Where a site is straightforward and planting stock has been ordered, planting within a year of application is achievable.

The key to a fast decision is choosing a site without sensitivities and preparing a plan with all the necessary information from the start. To support this, the Forestry Commission has introduced:

• clear application deadlines
• a Woodland Creation Fast Track for low‑sensitivity sites
• a target to process 90% of fast‑track applications within 60 working days, which we’ve already exceeded
• an additional £1,000 per hectare through the England Woodland Creation Offer for qualifying schemes

How long does woodland carbon last?

A common concern among investors is how durable woodland carbon really is.

Woodland is a permanent land use in the UK, as set out in the 1967 Forestry Act and 1998 Environmental Impact (Forestry) Regulations. Tree carbon stocks change through thinning, harvesting and restocking, but the land itself stays as woodland. To reflect this, the code limits the number of woodland carbon units it issues, based on how the woodland is managed, so units reflect the long-term increase in carbon stocks, averaged over several management cycles, rather than the highest carbon stock at maturity.

The code also manages risk through a pooled buffer. 20% of all woodland carbon units issued go into this buffer and are never sold. It covers the small number of permanent losses caused by development or severe natural disturbance. On top of this, the number of units a project can claim is reduced by a further 20% at the planning stage to prevent projects overestimating their carbon savings.

Recent analysis looked at current rates of permanent woodland loss from development and natural disturbance. It found that woodland carbon under the code lasts for an estimated 2,300 years. This makes it one of the most durable, nature‑based, carbon options available.

The Woodland Carbon Code and harvested wood products

Of course, when trees are harvested, much of the carbon remains as ‘harvested wood products’ in some cases for many decades or even centuries, representing another pool of durable carbon. However, the code only accounts for carbon within the forest boundary, where it can be measured and independently verified. The UK’s national greenhouse gas inventory does include harvested wood products, but the code operates at a project scale.

Currently, it is not possible to track individual timber batches through mills, into finished products, and through their working life, without risking double counting. If woodland owners could claim carbon in harvested wood products, the businesses using that timber further down the supply chain couldn’t also claim a carbon credit for using low-carbon materials. This would undermine their own low-carbon claims.

However, Grown in Britain has published the Biogenic Stored Carbon Quotient, the UK’s first certification scheme to measure and verify how much carbon is stored long-term in buildings using timber and other biogenic materials.

For now, keeping the boundary at the forest gate is essential for maintaining confidence in the carbon units issued and the reputation of the code.

Looking ahead

The code supports native, mixed and productive woodland, as long as carbon finance and public funding are applied proportionately and reported transparently. Its strength lies in its consistency, credibility and conservative design. Maintaining these safeguards will also be essential as government explores new ways of giving woodland creators greater certainty over future carbon revenues, while attracting more private investment into woodland creation.

As the UK looks to scale up woodland creation and attract private finance, the challenge isn’t choosing between carbon, timber or nature. It’s about aligning all three in a way that maintains trust and long‑term value.

For landowners and investors, well‑designed woodland remains a resilient, long‑term asset, delivering carbon, timber and wider public benefits within a robust and trusted framework.

Having worked on the code from the start, I’m confident that maintaining its credibility is what will support confidence for investors into the future.

1. Woodland area, UK, 1998 to 2026, Forest Research ↩︎
2. New planting and restocking, UK, 1971 to 2026, Forest Research ↩︎