Housing Development Planning: Water Companies

Sarah Dyke Excerpts

Wednesday 12th March 2025 Westminster Hall

[Helen Morgan (North Shropshire) (LD)]

I beg to move,

That this House has considered the role of water companies in new housing development planning.

It is a pleasure to serve under your chairship, Mrs Lewell-Buck. It is something of a cliché for a Liberal Democrat to be talking about sewage, but today I am breaking the mould and talking not about sewage in seas, lakes and rivers but about sewage in people’s homes and gardens. Buying a home in the UK is not easy. People spend years and years saving penny after penny, and when they finally sign on the dotted line and complete the purchase, they are relieved and delighted. They are not expecting to be forced to become an expert in complex regulations relating to drainage and the planning process. Most of all, they are not expecting raw sewage to start backing up through the manhole covers in their garden, the drains or, in the worst-case scenario, their downstairs loo, but unfortunately, that is what some of my constituents have had to deal with when buying or living near newly built houses in North Shropshire. I think the whole House should be asking itself how any water company, developer, conveyancer or local authority could think that this situation is acceptable.

During my time as MP for North Shropshire, there have been multiple incidents in which constituents have been put in this troubling position by the sewerage network failing, and I am quite angry about the lack of progress in dealing with the issue. Just two weeks ago, I attended a meeting with residents of a village in my constituency that has seen a relatively large amount of development in recent years; their village is low-lying and on a gentle slope. Severn Trent, the water company, has adopted the drainage system from the new developments, so this is not a case of a dodgy developer failing to build suitable infrastructure, but it is an old, medieval village and unfortunately the existing combined sewer infrastructure is inadequate to deal with prolonged rainfall and the additional homes connected to it.

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

I thank my hon. Friend for securing this really important debate. Speaking of medieval villages, I met residents of a little village called Mudford in my constituency last week. Two new housing applications have recently been approved for up to 1,000 homes just upstream on the River Yeo. Mudford already suffers from extreme flooding and relies on inadequate and fragile sewerage systems that already overflow regularly during heavy rain. Worryingly, the developers plan to use the same system despite clear environmental risks. Does my hon. Friend agree with me that water companies must be fully involved in the planning system, to ensure that water infrastructure can handle the demand and prevent future flooding and spills of sewage?

[Helen Morgan]

My hon. Friend describes a situation that I think we are all familiar with. I agree with her about the role of water companies and will go on to talk about that point at some length in my speech, so I thank her for that intervention.

When there is heavy rain, the residents I met struggle with surface water flooding and, unfortunately, with sewage backing up into homes and gardens, which we all agree is pretty horrible. Further homes in the area are in the planning process, so the residents are extremely concerned. Each year, their situation gets worse. An elderly resident told me that sometimes, when it has been raining heavily, she has to ask her neighbours not to use their bathroom, because sewage will flood into her garden if they do. That is not a position that any homeowner should be put in, so we need to ask ourselves how we have allowed this to happen in the first place.

We are acutely aware of the need to build more homes, and we support the Government in their mission to build more homes, but it is essential that the infrastructure for both new and existing residents keeps pace with development. Astonishingly, water companies are not statutory consultees when a housing development goes through the planning process. That means that there is no statutory safeguard for home buyers that the company responsible for dealing with their foul waste has ensured or confirmed that its existing sewers will cope; nor is there any statutory safeguard for existing residents against a new development bringing some unpleasant surprises.