I thank Ruth Davidson for her question, for downloading the app and for taking the opportunity to encourage other people to do so. I appeal to members across the chamber to follow that example. This is not political in any way. All of us have a duty to ask our fellow citizens to do the right thing.

Uptake is important, of course, which is why it is so vital that we encourage people to download the app. There are other views about whether it needs to reach a specific percentage. I take the view that the higher it is, the better—the more people who sign up the better. Everybody who signs up is making a contribution. When I left my office to come to the chamber the download number had just passed 150,000, which is really good progress after a few hours. I hope to see it rise further over the next few days. From tomorrow, there will be a major advertising campaign to back it.

The point about people who do not routinely use smartphones is important. It is for that reason, among others, that we decided not to base our entire test and protect system on a proximity tracing app. We built it from the bottom up, using tried and tested approaches in our public health teams and the app is an enhancement of that.

If you do not have a phone or use the app, you will not be missed from our test and protect system. Everybody who tests positive, notwithstanding the app, will still be contacted by a contact tracer and details of those with whom they have been in contact will be taken. The app adds to that system and it is important to recognise that.

The real value of the app is that it will help us to notify close contacts of positive cases who are not known to the person who has tested positive—somebody they have sat close to in a bus or a train, a pub or a restaurant. That is the importance of the enhancement.

Test and protect is working well—I say that with not a shred of complacency. The most up-to-date figures on its performance were published by Public Health Scotland yesterday. At this stage, well over 90 per cent of index cases and more than 90 per cent of close contacts are being contacted. It is working well, the app is an important enhancement and I hope that we will all get fully behind it.