Yes, sure. Thank you. We’re not at all comfortable having our performance in a number of areas not where it should be, and I want to reassure the committee that not only do we take it seriously, but we have plans to address those. Primarily, the issues there relate to a couple of areas. One was water quality in 2021, and we’ve addressed that, and you will see an improvement in water quality in 2022. That was generally due to a number of bacteriological failures—low level, very low level, no public health risk—and in 2022 we halved those. So, that’s there.
One of our real challenges in Wales is supply interruptions. This is where people have a loss of their water supply. And I must say, Steve touched on what happened in 2022. It doesn’t feel like a drought year this year, but last year—highest temperatures, lowest levels of rainfall in living memory and all that—and down in west Wales, our water network down there was particularly badly affected. We have water mains that are nearing the end of their lives. We’ve also done some academic studies and what we’ve found is that the level of ground movement in west Wales last year, which was then exacerbated by the freeze thaw that came along in December, is causing those mains to fail at a rate we have never seen before. So, this, for me, has absolutely clear links to climate change, soil moisture deficits and ground movement.
The way we will address that is that we have about £75 million in our next investment period, and if we get that through the regulatory process, we will do that. At present, around 45 per cent of our supply interruptions occur on our network in the west, and that’s something we've got to seriously address. This isn’t just about fixing those mains, this is about replacing that infrastructure. So, we’ve got a clear plan. As soon as we get the green light from Ofwat for that investment, as part of the price review 2024 process, we will be starting. Design is under way, and we will be cracking on with that. So, those are the primary areas where we are off the pace.
Now, in terms of our environmental performance, clearly a slight increase in pollutions in 2022 has also been under the ‘lagging’ category, and we have very, very strong plans to deal with those. That’s much more linked to those serious pollution incidents and the investment I touched on a little earlier, but it’s also about the operational things we can do: use of data science, target where we’re likely to get blockages. A wet wipe ban would be more than welcome, because 90 per cent of our first-time pollutions come from sewer blockages.
So, very, very clear plans, all funded, and we’re ready to deliver them. But I must emphasise, this is not going to be a turnaround in one year. Those mains that I’m talking about, we are talking about hundreds of kilometres that need to be replaced, and that will take time. So, getting back to the place that we’ve been in the past, in terms of performance, is probably going to have a trajectory of at least a couple of years.