Funding for this research was provided by:
Behavioural Insights Team
Received: 7 May 2021
Accepted: 8 February 2022
First Online: 12 May 2022
: The study was approved by the Research Ethics Committee of University College London (Reference: 12861/005). All participants provided informed consent.
: Not applicable
: AS is Chief Scientist and Director of Research and Evaluation at the Behavioural Insights Team. The authors declare no other conflicts of interest.