Results
We approached 31,020 people from 166 general practices across London and the Midlands (combined list size = 1,529,684); 2,220 expressed an interest in the trial and 41 people self-referred. Of them, 1,912 (85%) were contactable, and 1,159 (61%) of them were eligible. We randomized 736 (64%) of these people between 24 April 2017 and 31 March 2019 (