Ethical approval and registration
The design of this study conforms to the principles outlined in the Declaration of Helsinki and was approved by the South Central-Berkshire B Research Ethics Committee on 31 March 2021 (ref 21/SC/0042) and Northumbria University’s ethical approval system (Ref: 27828). All participants gave written informed consent and were informed about all relevant aspects of this study, including interviews, before commencing the study. This trial was listed on the ISRCTN registry with study ID ISRCTN46164906 on 21 April 2021.