Housing Development: Cumulative Impacts

Cameron Thomas Excerpts

Wednesday 17th December 2025 Westminster Hall

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

It is a pleasure, as ever, to serve under your chairmanship, Mr Twigg. I congratulate the right hon. Member for East Hampshire (Damian Hinds) on securing this important debate. It is a truth universally acknowledged that an MP in possession of a majority, however big, must be in want of a debate, so I am full of admiration for the right hon. Gentleman staying tomorrow to debate Jane Austen in Westminster Hall. As for myself, I am hoping to get away before that, so this will be my last appearance before Christmas. I therefore take the opportunity to wish hon. Members, the House staff who look after us so amazingly well, the officials, yourself, Mr Twigg, and even the hon. Member for Hamble Valley (Paul Holmes) a very merry Christmas, although I know he would prefer that my hon. Friend the Member for Surrey Heath (Dr Pinkerton) were here instead of me.

I say with some hesitation that I am hoping to go home before that, because it has been something of a week for the Ministry of Housing, Communities and Local Government. I am not quite sure how the Minister is still standing—he is sitting down now, but must need a break. Knowing the Minister’s prodigious amount of activity this week, perhaps tomorrow we will have three Bills and two White Papers coming out and I will be brought back here, but hopefully not. Yesterday, we were debating quarrying and planning—it was a blast. I did not know that I would be getting up and sitting down so many times on MCHLG business this week, but one could say that the Chairman of Ways and Means shapes our destinies, rough-hew them as we may.

I will move on to the more serious points of the debate about the cumulative impact of housing development. I fear that it is worse than the right hon. Member for East Hampshire surmises, because although I remember from my A-level economics that, in a perfect market, increasing supply should reduce price, we need to remember that in any locality in the country, we do not have a perfect market in house building. We have usually one supplier, maybe two, controlling the supply of homes to the market, drip-feeding them to sustain their prices. Any private house builder that went into business to reduce prices would rightly be punished by their shareholders. Putting private house builders in charge of reducing house prices is a bit like putting Herod in charge of childcare. As another seasonal reference, I am forced to consider what would be the cumulative impact of stables being used under permitted development for change of use to emergency temporary accommodation for young mothers.

The point that I think the right hon. Gentleman is really getting to with cumulative impact is the prolific number of permissions that are coming about outside the plan-led process. The plan-led process is so important because it is where cumulative impacts can be properly gauged and established. Any development that is not in the local plan, unless it has an environmental impact assessment, is not going to carry out a cumulative impact assessment. That is why we are so concerned that the Government’s recent announcements will undermine that plan-led process, with so many loopholes. To take one example, there is the abolition of the town centre-first approach for retail development, but there are many others that will undermine that plan-led process.

There is a particular need to look at the cumulative impact when it comes to flooding. The Environmental Audit Committee has recommended that the Government revise the guidance on the cumulative impact for flooding for this very reason. Many of the developments being discussed will not carry out cumulative impact assessments because they are outside the local plan or are sub-EIA development. I ask the Minister whether and to what extent the Government will carry out that review. Flooding is a massive issue for Rockwell Green and Hilly Head in my Taunton and Wellington constituency, which has been flooded twice in the last five to 10 years. We need to see a proper cumulative impact assessment of flood impact and flood risk.

[Cameron Thomas (Tewkesbury) (LD)]

The cumulative impact of development in Tewkesbury is nothing less than a threat to the continuing viability of Tewkesbury as a permanent settlement. The Environmental Audit Committee recently produced a report on flood resilience in England. Would my hon. Friend join me in asking the Government if they will implement recommendation 89 to make water bodies statutory consultees on development?

[Gideon Amos]

My hon. Friend makes a massively important point—absolutely, they should be statutory consultees. He gives me the opportunity to raise an even more serious concern. From careful reading of the Government’s snappily titled consultation on statutory consultees, alongside the ministerial statement of 10 March this year, it appears—I hope the Minister can put me right—that they are considering cancelling and withdrawing the direction that prevents councils from granting planning permission, against the advice of the Environment Agency, in flood risk areas. They are certainly consulting on that basis, so I hope the Minister will clarify whether that is the intended approach and how many homes in flood risk areas he expects will be permitted, against the advice of the Environment Agency, if they go ahead with that change. It is a very serious matter and could affect areas across the country—not only Rockwell Green in my constituency, but places far further afield.

My hon. Friend the Member for Honiton and Sidmouth (Richard Foord) made excellent points about the need for cumulative impact to be properly considered. My hon. Friend the Member for Horsham (John Milne) felt that plan-led development in his constituency was in jeopardy. I agree: after yesterday’s announcement, I feel that plan-led development is in jeopardy everywhere. The Saunders Lane development in Woking is a classic example of where proper consideration of cumulative impact is required.

The Liberal Democrats would pursue a different approach. Cognisant of the market conditions that exist in relation to private house building, we would focus on public investment in a programme of 150,000 social and council rent homes. In fact, we have never met the housing figure of 300,000 per year, except when we have had a big programme of council and social housing. With that element missing, private house building has bubbled along at more or less similar levels; third sector housing has increased somewhat. The big missing element has been council and publicly funded social homes.

For the reasons that I have set out, without a massive injection of such homes, we cannot rely on private house builders to increase supply in any meaningful way, however many permissions above and beyond the 1.4 million homes that have planning permission already, but are not being built, are given out. That figure, as my hon. Friends have explained, so clearly and starkly demonstrates why the challenge is not the issuing of planning permissions, but how to get those permissions built out. We urge the Minister to use much stronger “use it or lose it” measures to tackle unbuilt permissions. I welcomed the statement that he made in the summer about taking forward such measures, but we have yet to see anything really happen in that regard.

We need to remember those who cannot afford homes, and that however many private house builders provide more private homes, 99% of them will be out of reach of people who cannot afford a first home. That is why we need there to be social homes, but we also need a new generation of rent-to-own homes, so that people can get on the home ownership ladder at an early stage in life.

With that, Mr Twigg, I once again wish you a merry Christmas.

--- Later in debate ---

[Paul Holmes]

I disagree with the hon. Gentleman slightly. I remember that in the last Parliament, under the Conservative Government, there absolutely was a commitment from Planning Ministers and Secretaries of State to prioritise brownfield development. That was announced during our time in government by the former Prime Minister but three, and by a number of Ministers in the MHCLG.

[Cameron Thomas]

How many was that?

[Paul Holmes]

Well, I believe the hon. Gentleman will have watched the news. I would be the first to acknowledge that we had quite a few in the last Parliament, but there absolutely was prioritisation of brownfield sites first. We prioritised building houses where they were needed, not where they were not.

What steps do the Government plan to take to protect rural communities feeling the adverse effects of increased housing development? If the Government are serious about building homes and maintaining public confidence in the planning system, they must take cumulative impacts seriously, plan infrastructure properly and ensure that developments work with communities, not against them—something that the Liberal Democrats and my party have been very clear will be removed by the Planning and Infrastructure Bill and the English devolution Bill.

I have been very clear about my concerns regarding the Government’s housing targets and the credibility of the 1.5 million homes ambition, which is now being questioned by a number of experts. If the Government are serious about supporting the house building sector and securing its economic benefits, they must ensure that housing delivery is realistic, properly planned and supported by the necessary infrastructure. Crucially, this requires a far greater focus on the cumulative impact of development so that growth is sustainable, communities are supported, and the long-term economic and social benefits of house building are not undermined.

Finally, Mr Twigg, I wish you, the Clerks and staff, the Minister, and even the Liberal Democrats a very merry Christmas and a happy new year.

--- Later in debate ---

[Matthew Pennycook]

I do not think that is correct—at least not in the medium to long term. Going back to the point I just made about supply and demand, we have to build sufficient volumes of homes to arrest the steady rise over many years in house prices and start to gently bring them down over time. We are some way away from that, but the affordability uplift should respond over time if we start to build, in a high and sustainable manner, the large number of homes we need.

I will now address the rural-urban balance, which was raised by a number of colleagues. We have had this debate before. We recognise that the targets we have introduced are ambitious and they do mean uplifts in many areas, but such is the severity of the housing crisis in England that all parts of the country, including rural areas, must play their part in providing the volume of homes the country needs.

However, it is not the case that the new formula directs housing growth away from large urban areas. We scrapped the arbitrary 35% urban uplift that the previous Government applied to the 20 largest cities and urban centres—and the core of those centres, as was mentioned. However, across city regions, the new standard method increases targets by 20%. Through it, housing growth is directed to a wider range of urban areas, including smaller cities and urban areas as well as larger city areas.

London was referenced; under the previous Government, housing targets in London were deliberately set at entirely unrealistic levels because that arbitrary 35% standard method was applied not just to the core of our capital city, but to every London borough. We have revised that number down, but London still has a stretching house building target, which we increased in response to feedback to the consultation we received.

In the draft framework yesterday, as the shadow Minister and other hon. Members recognised, we also gave more support for a brownfield-first approach to housing. We welcome responses to the draft framework, through which we now have in-principle support for development within settlements, subject to specified exemptions where there could be unacceptable impacts. We have built on that with the announcement of a default “yes” for development on land within reasonable walking distance around train stations.

Local plans have been mentioned a number of times; in some ways, this gets to the heart of the matter. I would first say to the Liberal Democrat spokesman that, far from undermining the plan-led system, the announcements we made yesterday will strengthen the plan-led system. The clear, rules-based policies in that new draft framework will make it easier for local authorities to come forward under the new system of local plan making and get those plans in place more quickly and effectively.

Why do they need to be in place more quickly and effectively? Because authorities with an up-to-date local plan will typically meet the five-year housing land supply, which is what is required to pass the examination in the first place. Having a local plan in place supports a much more comprehensive approach to considering cumulative impacts of development, so we need those local plans in place across the country. It is not my party’s fault that we do not have universal coverage of local plans. I remember standing for years where the shadow Minister is now, telling Conservative Housing Ministers on this side of the Chamber to take effective action to use the full range of their intervention powers to drive up local plans. We are not there, but this Government are committed to doing that.

The right hon. Member for East Hampshire knows about this, as we have discussed it before: local authorities are able to justify a lower housing requirement than the figure that the standard method sets, on the basis of local constraints on land and delivery, such as natural landscapes, protected habitats and flood-risk areas.

[Cameron Thomas]

I thank the Minister very much for giving way, and I wish him a merry Christmas. Nothing would empower my local authority more than the Government implementing recommendation 89 of the EAC’s report into flood resilience in England. Will his Department do that?

[Matthew Pennycook]

We will respond in due course to that report, in the usual way. I take the hon. Gentleman’s point about flood risk; I am trying to set out that local constraints can be taken into account in the context of local plans. Government provide flexibility in policy for areas that have such local constraints when calculating housing needs and setting targets, and we provided further guidance on the matter alongside the December 2024 NPPF.

East Hampshire district council is availing itself of that flexibility through the use of a locally determined method, as part of its efforts to progress towards submitting its plan for examination. My officials have been actively supporting that process, including by facilitating an advisory visit for the Planning Inspectorate, and I will continue to meet with officers to discuss any further support.

Several hon. Members mentioned the duty to co-operate. Local authorities often face pressure from neighbouring authorities to meet unmet housing needs under the duty. I recently announced that the duty as a legal provision will cease to exist once the new planning system regulations come into force early next year. However, East Hampshire and neighbouring authorities will still be expected to show that they have collaborated across boundaries, including on meeting unmet need, in line with the current and draft NPPF, which set out policies on maintaining effective co-operation.

I understand hon. Members’ long-standing concerns about infrastructure. The Government are aware that there is more to do across Government and with the sector to ensure that the right infrastructure gets built. I draw hon. Members’ attention to the remarks I made in the statement yesterday. The previous NPPF, from December 2024, strengthened the support for infrastructure —particularly essential infrastructure such as health services and schools—and the latest draft, which we published yesterday, consolidates and strengthens that. On top of that, through the Planning and Infrastructure Bill, which should receive Royal Assent this week, we are streamlining the delivery of nationally critical infrastructure, from rail to roads to reservoirs, across the country.

The shadow Minister asked me about section 106. We want to see a simpler, more transparent and more robust section 106 system. That should include standardised templates. As the NPPF published yesterday shows, we think that, in the first instance, that should be rolled out on medium sites.

To conclude, I thank the right hon. Member for East Hampshire once again for giving the House an opportunity to discuss this important range of matters. As in our debate earlier this year, I appreciate that I will not have convinced him of the merits of the Government’s approach to planning reform or the standard method, but I hope that I have provided him and other hon. Members with sufficient reassurance in respect of local plans, infrastructure and other important matters. I too wish all hon. Members, you, Mr Twigg, House staff and officials a merry Christmas. I hope that everyone has a well-deserved break.