Planning and Infrastructure Bill

Debate between Baroness Parminter and Baroness Freeman of Steventon

Committee stage
Monday 15th September 2025 Lords Chamber

[Baroness Freeman of Steventon (CB)]

My Lords, I also support all the amendments in this group, which I think would support the Government’s stated aim to help nature in this Bill by making sure that the places that we build for humans at least minimise harm to wildlife and, in the case of swift bricks, actually help it.

I speak to Amendment 225 in my name and thank the noble Lords who have also put their names to it and support it. This amendment would require the Secretary of State to publish guidance on bird-safe design of buildings and to ensure that new buildings and significant changes to existing but not exempted heritage buildings incorporate this guidance as far as is practicable. Incorporating this amendment would not only bring the United Kingdom into alignment with what is seen in other jurisdictions around the world but would make the UK the first to introduce national bird safety legislation, which is something that could provide a welcome positive message for the Government to project.

I know that there are broader environmental concerns with the Bill, which we shall come on to later tonight, but the potential positive effects of this single amendment are enormous. Remember that the number of birds thought to be killed by flying into glass in buildings in the UK is over 30 million per year. The problems are simple. First, birds cannot see glass. Clear glass or glass that is reflecting nearby trees or sky is a hazard. Secondly, at night, artificial lighting, particularly in tall buildings, can disorientate migrating birds, making them end up circling the lights until they are exhausted and crash into a building.

The solutions are also simple, well researched and legislated for in many places. I have been able to base the wording of this amendment on that in many other jurisdictions, such as San Francisco, which has mandated bird-safe standards since 2011, Washington DC, New York, Portland in Oregon, Toronto, Calgary, Hesse and Zurich. There are also bird-safe design guides based on 40 years’ worth of research that can provide an easy reference from the United States, Canada and Singapore. We have experts in the UK too. They all agree on some simple features of buildings to avoid—essentially, ones that make it look as though a bird can fly through safely to reach sky or a perch in a tree, but where there is actually a sheet of lethal glass. These can be removed through thoughtful architectural design, or you can use bird-safe glass. That is simply glass that is made visible to birds, either through patterns that we can also see or through patterns that reflect ultraviolet, which are invisible to us but visible to birds.

Research has shown that specific patterns, such as lines no thinner than two millimetres, spaced no wider than 50 millimetres apart, can effectively stop a bird flying into glass—a more than 90% reduction in collisions in tests. These test centres can therefore certify bird-safe glass, and there are many designs available from different manufacturers, including the UK’s Pilkington glass, which has a certified variety.

Then there is night-time lighting. Many cities around the world now have lights-out times. Even New York’s Twin Towers memorial beams get switched off for periods during bird migrations to help birds escape their fatal attraction. In the UK, awareness of this problem and its simple solutions is surprisingly low compared to North America. Experts I have spoken to around the world were delighted to hear from me, because they think of Britain as being so far behind in bird-safe buildings despite a world-leading status in so much animal welfare research and legislation. This amendment could put us back as global leaders in having the first national bird safety legislation, it would help put the Bill in line with the Animal Welfare (Sentience) Act 2022, as the Animal Sentience Committee has already pointed out, and it could save tens of millions of birds every year.

As for the cost, producing guidelines is easy, as I say, given the plethora of sources already available. Bird-safe architectural design is also easy once you know the guidelines. In a double win, many of the coatings and shades that help make glass less dangerous to birds also help with thermal issues and energy efficiency in glass buildings. The regulations on night-time lighting could help energy efficiency too. The cost of glass varies depending on specifications, but manufacturers that I have spoken to estimate that, at the moment, the cost of bird-safe glass in commercial buildings is about 5% more than normal glass and about 10% more for a domestic glazing unit, but all have said that those costs would come down quickly with scale. Not only that, but bird-safe glass apparently used to be made here in the UK, with 90% of it exported to projects in China, Europe and North America, driven by their legislation. With the market mainly being overseas, manufacturers have now mostly moved from the UK to Germany to follow demand, but could return if we caught up with global bird-safe legislation.

Amendment 225 seems to me an example of the much sought after win-win. Putting it into this Bill, alongside others in this group, would help demonstrate the Government’s stated commitment to helping nature and nature recovery, alongside helping British businesses and not slowing down any housebuilding. I very much hope that the Minister will agree.

[Baroness Parminter (LD)]

My Lords, in the absence of my noble friend Lady Grender, I will speak to her Amendment 338. I am grateful, as I am sure she would be if she were here, for the support of the noble Baroness, Lady Freeman of Steventon. This is a debate where I think we are going to have unanimity around the House; we on these Benches agree with all the amendments in this group. I will make a few swift points about the specifics of the amendment from my noble friend, which is about homes for nature at the same time as homes for people; it would amend building regulations to protect biodiversity in all new developments.

If we are to have homes where nature can live, feed and breed, we will have to take specific measures. I absolutely support what the noble Lord, Lord Randall, articulated so well in moving the amendment tabled in the name of the noble Lord, Lord Goldsmith. I am not going to talk about swift bricks, which are included in the amendment from my noble friend Lady Grender, but I want to talk about some of the other very much endangered species which it also covers, including bird boxes, bat boxes and hedgehog highways.