Grey Belt Land: Definition and Application

Gideon Amos Excerpts

Tuesday 15th September 2026 Westminster Hall

[Gideon Amos (Taunton and Wellington) (LD)]

It is a pleasure to serve under you in the Chair, Dame Siobhain. I thank the right hon. and learned Member for Kenilworth and Southam (Sir Jeremy Wright) for bringing to the House an important debate on an issue that affects a lot of our constituencies. I also thank all the Members who contributed today, including my hon. Friend the Member for Woking (Mr Forster)—indeed, I thank him for contributing in this Chamber for the second time today.

The Liberal Democrats want to see more homes built, principally the 150,000 council and social rent homes that the country needs, but the right way to deliver those homes is by working with communities and trusting them, and prioritising brownfield sites, the 700,000 empty homes in the country, and the 500,000 homes that could be provided in empty commercial buildings, according to the London School of Economics.

When it comes to the green belt, few of us, and certainly not the Liberal Democrats, would object to a community deciding, through its democratic local plan, to release formerly green-belt land for its own reasons, and particularly for social homes. But the Government’s grey-belt policy is not that. It is being abused, giving carte blanche to development pretty much anywhere and, as it is currently set out in the national planning policy framework, it has to go. We were told that “grey belt” meant disused car parks and old petrol stations, but the CPRE has found that, in the first year, 88% of homes approved on the grey belt at appeal were on land that had never been built on, as the right hon. and learned Member for Kenilworth and Southam also pointed out.

In this Chamber in July, the Minister told us:

“The definition of grey belt is set out in the glossary of the NPPF.”—[Official Report, 16 July 2026; Vol. 789, c. 466WH.]

There is a definition there, but for me it has more holes than a Swiss cheese. It omits to protect two of the green belt’s five purposes—safeguarding the countryside from encroachment and recycling derelict land. Because the purposes that are left do not apply to villages, it has also removed villages from the green-belt protections that they have had for more than a century, so a field on the edge of a green-belt village is very likely to be grey belt. Developers know it and are trying their luck.

On 7 September, the Secretary of State told the House that she is

“strengthening and clarifying the rules around the release of grey belt”.—[Official Report, 7 September 2026; Vol. 790, c. 643.]

If there is no confusion, what is being clarified? The answer so far has been to take the test for protected landscapes out of the definition altogether. That widens the grey belt rather than tightening it. On the same day, the Minister confirmed that the Government do not collect data on how much land councils have identified as grey belt. Will the Minister commit to collecting that? My hon. Friend the Member for Harpenden and Berkhamsted (Victoria Collins) asked for that last October.

The new national planning policy framework requires every green-belt council to plan for grey-belt releases, allocated in its local plan. But since the Government’s grey-belt rules allow any developer to apply for grey-belt development on any site, whether or not it has been allocated as grey belt in the local plan, there can be little point in pretending that the local plan approach is the only one, or that grey-belt development is, in any sense, being plan led.

Developers do not need a grey-belt policy to redevelop an old petrol station in any event. Redeveloping previously developed land in the green belt has been allowed since 2012, if not longer, as long as it does not harm openness more than the development previously there. What grey belt adds is the field next to it, and it is decided at appeal, rather than through the local plan—that is, rather than by the local community. That is another instance where community powers have been stripped away in what the Town and Country Planning Association has called an “unprecedently permissive” planning regime.

This policy comes into play where there is unmet need—in practice, where a council cannot show a five-year land supply. In Somerset, the Government are mandating that another 75,000 homes—a 41% increase—should be found in the next local plan. I have not met anyone who believes that is realistic or achievable. The targets are derived from the Government’s new standard method, which has in one fell swoop thrown much of England under the threat of development, as the majority of councils cannot meet such impossible targets under the new standard method. It would take them the two-year local plan process to escape that threat, and millions of pounds to boot. This could be called a developer’s charter but, unfortunately, many of these sites are not being developed, so it is more of a land speculator’s charter.

Developers, not the community, end up selecting which part of the green belt is up for grabs. Villages are hit hardest, not just because they have lost their green-belt protection but because for many, if not all, the new targets have undermined the one thing that has reliably delivered affordable homes for local people in rural areas: rural exception sites. Last week, I brought to the House an example from an inspector’s decision in Gweek, Cornwall.

The Minister told us in July that the framework makes exception sites easier. In reality, exception sites work where agricultural land that is worth, say, £12,000 an acre cannot be sold for a higher price for commercial housing due to strict planning rules, so it might as well be allowed to be sold for agricultural value, or a little more, for social housing that helps the village. The Government, however, have now told every landowner around villages and elsewhere that their acre could be worth not just £12,000 but anything from £150,000 to £3 million—the price of land with residential permission—because those strict planning policy preventions no longer apply, and because anyone can apply for it to be developed as grey belt anywhere in the green belt.

If a landowner is told that their field might be grey belt, why would they sell it for £12,000 for social housing, when they could get £150,000 or more? It would definitely be more in the home counties and near London. Hope value has always been the enemy of exception sites, and the way that the grey belt has been implemented has created hope value around every village and green belt—so goodbye to social housing on such exception sites. Building the kind of homes that villages lack just got harder.

We do agree on the golden rules, which rightly require more affordable and social housing where green-belt land is released. That is absolutely right, but it does not mean that valuable green spaces should be up for grabs. Ironically, an area with no green belt can be better protected from some of these policies, but that does not mean that our green spaces in Taunton and Wellington are safe.

In Taunton, we have green wedges—countryside running right into the town and doing the job that the green belt does elsewhere—but those spaces have only local policy protection. Earlier this year, consultants recommended releasing Trull green wedge from its green wedge status, ironically because it was the last bit of green remaining in a built-up area. That is something that, in my opinion, made it more valuable not less. An application for 125 homes quickly followed, because the council, like most in England, cannot meet its new five-year land supply. Our councillors rightly refused the application. Fortunately, it was under the 150 homes limit, above which councillors must now ask Whitehall’s permission to refuse a development.

The appeals public inquiry has just begun showing how thin green wedge protection is. The green belt, green wedges and local green spaces can all be weakened by the next rewriting of the framework, without this House having a vote. In the Liberal Democrats’ view, all communities—not just those in the green belt—should have a stronger and longer-lasting way to protect their most precious green spaces.

What should we do instead? First, we should scrap the grey belt and instead release green-belt land through community-led local plans, with the golden rules applying in full and with social homes at their heart. Secondly, we should keep the long-standing exception for previously developed land, and make brownfield-first a legal requirement. Thirdly, we should give communities who review their green belt 20 years’ statutory protection for the green wedges and green belt that they prioritise. That would give them confidence that, instead of a free-for-all, their most precious green spaces will be protected in law for the long term.

If people are to accept the homes that we need—and we do need them—they must have confidence in the protection for the bits of green space that are most precious to them and most dear to those communities, as our amendment to the Planning and Infrastructure Act 2025 set out. We were promised that the grey belt would turn old petrol stations into homes, but what it is actually delivering is the loss of green field after green field, as decided by the Government’s policy issued in Whitehall. It is time to scrap it and put communities back in charge of their green belt and their green spaces.

--- Later in debate ---

[The Minister for Housing and Planning (Matthew Pennycook)]

It is a pleasure to serve with you in the Chair, Dame Siobhain. I congratulate the right hon. and learned Member for Kenilworth and Southam (Sir Jeremy Wright) on securing this debate. He is an assiduous and highly effective parliamentarian, whom I have the upmost respect for, and he opened the debate with a characteristically incisive and challenging contribution. I thank him for the opportunity he has given the Chamber to debate this issue, and I will seek in the course of my remarks to respond to each of his specific points.

I also thank the hon. Members who have spoken in the debate. I appreciate fully that this topic provokes strong views, to put it mildly, but in the time I have available, I hope to provide some further clarity on the Government’s green belt policy, specifically the nuances of national policy relating to grey belt. Hon. Members and the right hon. and learned Member for Kenilworth and Southam will appreciate that, due to the quasi-judicial nature of the planning process, I will be unable to comment in detail on individual local plans, planning applications or how individual local planning authorities may interpret national planning policy.

As the right hon. and learned Member made clear in his opening remarks, the definition of grey belt is set out in the glossary of the “National Planning Policy Framework”. It is defined, for the purposes of plan making and decision making, as

“land in the Green Belt comprising previously developed land and/or any other land that, in either case, does not…contribute to any of purposes (a), (b), or (d)”,

as set out in NPPF policy GB2. As I make that point, it is also worth making it clear that we have not altered the five purposes of the green belt that we inherited. They remain as they were, and we do not propose to alter the general extent of the green belt either.

I will come on to expand on the role of local planning authorities in the process. It is for individual local planning authorities to undertake the necessary assessments to identify if land is grey belt, either through plan making or through considering specific applications that come forward. Let me take each of those in turn, starting with plan making, and in doing so gently push back on the Liberal Democrat spokesman, the hon. Member for Woking (Mr Forster).

This is, and is intended to be, a plan-led approach. The NPPF allows for local planning authorities to alter green belt boundaries using the local development plan process in “exceptional circumstances”. That includes situations where a local authority is unable to meet its identified need for development, having examined all other reasonable options for doing so, including making as much use as possible of suitable previously developed land, optimising the density of development and assessing whether sufficient sites can be identified outside the green belt. As set out in NPPF policy GB2, any decision to alter green belt boundaries should be informed by a green belt assessment, which identifies grey-belt land within the green belt.

Following the publication of the revised NPPF in December 2024, the Government awarded over £9.3 million to 133 local planning authorities to support them with the costs of undertaking such green belt reviews. An assessment of the strategic role of the green belt should also inform the preparation of spatial development strategies, as legislated through the Planning and Infrastructure Act 2025, where these will be setting the strategic context for land release.

[Gideon Amos]

The Minister is always generous with his time and in responding to interventions, which is appreciated by all of us. If the intention is that this should be a plan-led approach, will he remove the provisions in the NPPF that allow developers to claim that their land is grey belt through an application by reference to the policies that have been put in the NPPF for such grey belt decisions to be made outside of the local plan process through individual planning applications?

[Matthew Pennycook]

I will say two things in respect to that, and I will come on to detail how the approach works in relation to decision making very shortly. In general terms, developers can make whatever claims they like about any particular site across the country; it is for the local authority to assess whether, in its view, that site constitutes grey belt, if that is part of the application that is submitted. Where there is disagreement and it goes to appeal, I have set out exactly how planning inspectors need to determine such applications.

It is crucial to note that where grey belt is identified, it does not automatically follow that it should be allocated for development or released from the green belt, or that development proposals be approved in all circumstances. Other considerations in decision making are relevant, as I will expand upon shortly. I also want to stress that any alterations to green belt boundaries must promote sustainable patterns of development by ensuring that any alterations, taken together, do not fundamentally undermine the five green belt purposes of the remaining green belt when considered across the plan area. Considerations also include giving priority to the release of previously developed land in the green belt, then considering low-quality grey-belt land, which will include disused petrol stations and other previously developed land of that kind, although not necessarily be limited to it, and only then exploring other green belt locations.

To respond to the right hon. and learned Member for Kenilworth and Southam on whether allocating grey-belt land for development will necessarily lead to the cumulative erosion of the green belt over time, I would point out two things. First, as I have already mentioned, development proposals on grey-belt land must respond to a demonstrable unmet need—I will come to his points about the standard method shortly. Secondly, it is precisely to avoid the situation that we inherited—which was a haphazard and piecemeal approach to green belt land designation and release—that this Government have implemented the approach that we have. Its effective working is predicated on ensuring that designation and release take place in a strategic manner over time through local plans with a 10-year horizon, and in due course—because they are just as important—through spatial development strategies with a 20-year horizon. We want the approach to be plan-led.