I think that this argument against testing is wrong. I think that we should test, test, test, and that is what this Government are doing. We are working very closely with the Government in Scotland, from the same party that the hon. Lady represents, to make sure that we use testing as widely as possible to find people who have this virus. Yes, of course different tests have different characteristics. The lateral flow tests find around 70% of those who are infectious. That means that if we test people who would not otherwise have been tested, we find the positive cases, we can get them to isolate and we can break the chains of transmission. I strongly urge the hon. Lady to go back, to study the details and to back the testing programme that we have in this country.