We will also add information about the local area or property where you live. This could be information such as air pollution levels, green spaces, local amenities or the energy efficiency of your home. Much of this information is publicly available and it is not individual level information about you, so we do not ask your permission to add it. We plan to do this for everyone who takes part in the study. However, you can opt out by contacting the study team using the details in the footer.