Planning and Infrastructure Bill

Debate between Baroness Bennett of Manor Castle and Baroness Parminter

Committee stage
Tuesday 9th September 2025 Lords Chamber

[Baroness Parminter (LD)]

My Lords, I support all three amendments that the noble Baroness, Lady Hodgson of Abinger, has brought forward. But for brevity, I am going to address my remarks to only one of them. The Private Member’s Bill she referred to when talking about her Amendment 117 was brought to the House by a Liberal Democrat Member, Max Wilkinson.

I particularly want to address the issue of rainwater harvesting. As the noble Baroness rightly said, there is an ecological issue already with us; there is insufficient water because of the changes in our weather patterns from climate change. But if the Government are not prepared to listen to those reasons, then surely from an economic point of view this amendment makes perfect sense.

First, we are already facing housing developments not being built because of water shortages, and secondly, if the Government want to get the large number of new data centres introduced, they are going to need a heck of a lot more water. It has been estimated that the large data centres use the equivalent of 50,000 homes- worth of water a day. Unless we use every single means at our disposal to utilise water properly, we are not going to be able to build the homes or the data centres that we want, so we need to look at measures such as this right now.

Some noble Lords might say that the public would not like the idea of using rainwater harvesting in their own homes. However, a recent survey by Public First asked 4,000 UK residents that question, and there was overwhelming support for the use of rainwater harvesting, both outside in people’s gardens and inside their homes for flushing the loo or using the washing machine—as the noble Baroness has said.

It is not just the noble Baroness, me and others who are making the case for rainwater harvesting. In Jon Cunliffe’s recent independent review of the future of the water industry, he made a specific recommendation about the need for rainwater harvesting to be addressed urgently. During the repeat of the Statement on the Independent Water Commission in this House on 23 July, I asked the Minister—the noble Baroness, Lady Hayman of Ullock—whether the Government would not wait for the proposed water Bill to pick up Jon Cunliffe’s recommendation but rather look at opportunities like the Planning and Infrastructure Bill to bring forward changes to building regulations so that rainwater harvesting could be mandated on new homes.

The Minister, somewhat surprisingly, immediately thought that this was a good idea—I do not often get such positive responses from the Front Bench opposite—and promised to take the matter forward and discuss it with the Minister for Water. I hope that, when the Minister responds to these amendments, she can show the House that those discussions have taken place, that the Government are taking the issue of rainwater harvesting seriously and that there will be a mandate to change building regulations.

[Baroness Bennett of Manor Castle (GP)]

My Lords, it is a great pleasure to follow the noble Baronesses, Lady Hodgson and Lady Parminter, and to offer support for Amendment 115, to which I attach my name, and for the general intention of Amendments 116 and 117. In the interests of time, I will restrict myself to Amendment 115.

I do not often take your Lordships’ House back to my Australian origins, but as this amendment has come up, I really have to. I am going back about 35 years to a place called Quirindi in north-west New South Wales. Somewhere out on the internet there is a photo of me sitting on a horse in a field, or paddock as we would say, that is dead flat and dead dry, without a blade of grass on it—that is Quirindi.

As an agricultural science student, I remember the farmer explaining how to live there. He took me out the back to the water tank, which was a very large tank that caught the water off the farmhouse roof. There was no town water in Australian farming, so that entire operation and household depended on the water that they caught off the roof. I still remember the farmer rapping on the side of the tin tank and saying, “That’s where the water is; we’re in trouble”.

Noble Lords might think, “Oh, that’s Australia—that’s far away; that’s a very distant place”. Quirindi has an annual average rainfall of 684 millimetres a year. There are parts of south-east England that have an annual rainfall of 700 millimetres a year, which is essentially the same amount. There is also the impact of the climate emergency and the fact that we are seeing more weather extremes and more drying out.

There is something Britain can learn from the Australian practices that have been enforced over history and that can be imported here for a win-win benefit. No one loses from the proposal in Amendment 115. As I think has already been mentioned, we in the UK use about 150 litres of water a day per capita. That compares with France, which uses 128; Germany, which uses 122; and Spain, which uses 120. This is expensively treated drinking water that we are using for all kinds of practices that we do not need to use drinking water for.

I am going to quote Mark Lloyd, the chief executive of the Rivers Trust:

“We also need to finally implement the use of rainwater rather than drinking water where we can, such as car washing, gardening, washing pets, filling paddling pools, and flushing the loo. Other water-stressed countries have used this approach for decades and we need to join that party.”


I really stress the “party” element. I do not think we have mentioned the issue of flooding yet. Many of us have been speaking about the need for land management to slow the flow. What could be a better way to slow the flow than to catch that water so that it is not flooding out into our drains, water treatment plants, rivers and seas and so that we can have it available for use?

Often, when we talk about water use, there is a lot of finger-waving: “People should switch the tap off when they’re brushing their teeth and people should have shorter showers”. But what we really need is a system change that makes doing the right thing the easiest, cheapest, simplest and most natural thing to do. That is exactly what this proposal is putting forward. So this is a win-win all round: for householders, cutting their bills; for preventing flooding; for protecting the environment; and for saving energy—we do not think about this much, but moving water around and treating water uses a great deal of energy. I looked up the stats, and we do not seem to have any good stats in the UK, but globally, the United Nations says that 8% of energy use goes towards treating and moving water. That is such a waste when you have water falling on your roof that you can use right there in place. Pumping it out to a reservoir, treating it and pumping it back in—all that uses energy. This is a common-sense measure; why on earth not?