Global Biodiversity and Ecosystems: National Security

Sarah Dyke Excerpts

Thursday 3rd September 2026 Westminster Hall

[Sarah Dyke (Glastonbury and Somerton) (LD)]

It is an honour to serve with you in the Chair, Sir Desmond. I congratulate the hon. Member for Waveney Valley (Adrian Ramsay) on securing this important debate.

Disappointingly, this heavily abridged report did not reach the Chamber in Government time, and when it was finally released, the timing coincided with Davos, which dominated the headlines. That raises questions about how seriously this Government take the warning from their own report that nature is a foundation of national security and can no longer be treated in isolation from it.

[Olly Glover (Didcot and Wantage) (LD)]

My hon. Friend makes a very good point about the seriousness of this issue. Does she agree that a great way for the Government to show they understand that seriousness would be to publish the report in full and agree to a national broadcast and a national emergency briefing?

[Sarah Dyke]

I wholeheartedly agree. The report describes a collapse of interconnected natural systems reaching a point of no return—the loss of climate regulation destroying harvests in the world’s breadbasket regions, triggering famine, disease and mass migration, driving up food prices and poverty here in the UK. With 77% of land in England and Wales farmed or managed by farmers, and more than 800 farms in my constituency of Glastonbury and Somerton alone, we already know who would be best placed to lead our investment in long-term biodiversity resilience.

[Dr Scott Arthur (Edinburgh South West) (Lab)]

The hon. Lady makes a really good point. When I speak to farmers in Edinburgh South West, they often feel that they are the problem when it comes to protecting biodiversity; in fact, they are the solution. We should be doing all we can to support the Government to support farmers to help protect our environment.

[Sarah Dyke]

I absolutely agree, which brings me to my next point. As Martin Lines of the Nature Friendly Farming Network puts it, healthy soils and water functioning as good systems should be treated as critical national infrastructure. He argues for more spongy landscapes, healthier soils, wetlands, ponds and trees that hold water, buffering both drought and flooding, while still supporting food production.

With DEFRA budget cuts slashing the farming budget by more than £100 million and uncertainty over future support systems, many are disincentivised from the environmental role that their own survival depends on. We know that nature-friendly farming can bring real ecological improvement.

The Lang Partnership in Curry Rivel has proudly championed regenerative and nature-friendly farming methods for more than 30 years, showing what is possible when farmers are committed to working with nature rather than against it, but this needs widespread adaption and adoption to work.

The environmental land management scheme should be a vital road map to a resilient farming sector, but there has been a lack of investment in higher-tier schemes that will deliver the best outcomes for nature. That is why the Liberal Democrats would invest an additional £1 billion—a cash injection—into the farming budget, properly phased to target where it helps nature the most and to help farmers to boost food security, rather than allowing them to fall through the gaps.

[Terry Jermy (South West Norfolk) (Lab)]

There are a number of rare and unique landscapes across the country, such as the Brecks in my own constituency. Does the hon. Lady support calls for increased funding for specific landscapes impacted by climate change and biodiversity loss?

[Sarah Dyke]

I agree with my hon. Friend—I call him that as he sits on the Environment, Food and Rural Affairs Committee with me.

This summer’s drought has put farmers under severe financial pressure. A potato farmer in my constituency, James Pullen of Perrins Hill Farm in Tintinhull, told me that he expects to be £200,000 down on his potato sales this year. In a good year, his crop averages around 25 tonnes to the acre, but this year it will be closer to 20 tonnes, with potatoes badly bruised or simply failing to grow.

I am grateful for the recently announced drought support for farmers, but we need real action that prevents ecosystem collapse and the heightened risk that that poses for our food security. We also need investment to hold water on farm reservoirs and fire ponds—nature-based solutions to water scarcity that will irrigate the land during prolonged drought and help communities to battle wildfires. However, farm reservoirs are not being built quickly enough to meet demand, as they are being held back by abstraction licences, planning permission, cost implications, uncertain grants and limited contractor availability.

[Jessica Toale (Bournemouth West) (Lab)]

Will the hon. Lady give way?

[Sarah Dyke]

I will not, if the hon. Lady does not mind, because I have quite a lot to get through.

I recently visited Wessex Water’s constructed wetland at Shapwick Heath in the constituency of my hon. Friend the Member for Wells and Mendip Hills (Tessa Munt). At 21 hectares, it is the largest water treatment wetland of its kind in the UK, filtering forever chemicals, phosphates and microplastics from our water, while boosting flood resilience and supporting Somerset’s biodiversity. Wessex Water is currently upgrading its sewage treatment plant, which will remove 170 tonnes of phosphates over the next 10 years. To put that into context, the 18,000 homes across Somerset that are currently stuck in a planning moratorium due to the nutrient neutrality regulations would produce only 3 tonnes of phosphate. That clearly demonstrates what nature-based solutions can bring to the future of water management and nutrient neutrality.

Somerset is increasingly exposed to devastating flooding that impacts farmers and homeowners alike. I was really happy to secure £50 million of flood defence funding for Somerset earlier this year, and I welcome Somerset council agreeing to ringfence some of those funds to target nature-based solutions that work in conjunction with hard engineering river maintenance across high-risk catchments, restoring natural hydrology upstream while protecting communities and infrastructure downstream. I am also pleased that a major element of the programme will be the council’s “My Community” programme, empowering local communities with bespoke, bureaucracy-cutting support and creating shared action on the ground.

Peatlands like those in the Somerset levels and moors provide vital species habitats, flood alleviation and water filtration, yet across the UK over 80% of peatlands are damaged. Somerset is one of only two counties still extracting peat, with licences to 2042 despite the levels and moors storing an estimated 11 million tonnes of carbon, which is equivalent to 10 years of the county’s emission. My Horticultural Peat (Prohibition of Sale) Bill sought to end the sale of peat, building on local efforts that are already under way, with companies such as Durstons near Street and RocketGro growing peat-free compost ranges. I congratulate the Minister on her new role, but I would be grateful for clarity on peat issues. Will there be a dedicated funding scheme for peatland restoration once the nature for climate peatland grant scheme ends next year? Will she go further and provide a timeline on when the Government will seek to end the sale of horticultural peat?

Habitat destruction also impacts insect life. For example, the shrill carder bee, which is one of the UK’s rarest bumblebees, has retreated from its historic stronghold on the Somerset levels and moors to a depleting population around Somerton, Castle Cary and Ham Hill. Its numbers have collapsed from around 140 in 2015 to just seven in 2022. Only five of 22 biodiversity indicators show long-term improvement, and 13 are still deteriorating. Does the Minister accept that the Government’s current approach is failing to meet their own Environment Act targets? What new action will change that trajectory?

Central to this failure to protect habitats is planning policy. The Government must adopt a strategic spatial approach to planning that protects the UK’s most important places for nature, which would support, not undermine, environmental regulation and champion nature-friendly design in house building and infrastructure from the outset. That is why the Liberal Democrats opposed and voted against Labour’s Planning and Infrastructure Act 2025.

If the Government are expecting 75,000 of their 1.5 million homes target to be delivered in Somerset, they must be fit for the future. I visited Bradfords Building Supplies in Glastonbury recently to discuss exactly this: how we make homes resilient to a changing climate, and how we prepare for extreme heat in summer and flooding in winter, including by making sustainable drainage systems mandatory in new developments. We cannot keep building homes for yesterday’s climate; Government planning policy needs to catch up.

[Julia Buckley (Shrewsbury) (Lab)]

Will the hon. Lady give way?

--- Later in debate ---

[Sarah Dyke]

I will not, just because of time.

We are also calling for the loopholes in the biodiversity net gain system to be closed, for the extension of how long a net gain habitat must be maintained from 30 years to 120 years, and for raising the requirement for major developments on larger greenfield sites from 10% to 100%. The case could not be starker. The Green Finance Institute puts the potential economic hit from nature degradation at the equivalent of 12% of GDP. That is more than twice the impact of the 2008 financial crash.

To conclude, this report was published in January. Half a year on, we have already seen the devastation that this year’s climate crisis has brought to the UK. Will the Minister confirm whether DEFRA and the Joint Intelligence Committee will reclassify the food security risk as high, publish the full assessment as originally intended, and act with the urgency it deserves, including through an annual climate and nature statement to Parliament?