Mr. Richard Butler:

For the retrofitting and all that, you are changing the performance and type of the house and making it more energy-efficient and have more ventilation, for example. The way people have used the houses in the past may have to change as part of that in respect of, for example, cooking, boiling potatoes, rice, pasta and the steam, and getting that condensation out of the house and making sure the ventilation systems that have been put in are properly used for that. It is key to the performance of the building and the people’s welfare in it, as well as health and safety.