Plans to promote participant retention and complete follow-up 
During the screening process, study candidates will receive information about the study in the form of a study ‘ad’ and an extensive participant information leaflet describing the study in detail. Study candidates will have ample opportunity to ask questions about the study, at all stages of participation. Eligible candidates will be encouraged to enrol only if they are willing and able to commit to the 18-week study period (6-week intervention plus 12-week follow-up). Every effort will be made by the research assistant to remain in contact, as deemed appropriate, with all study participants throughout their participation. Participants will also have the contact details of the research team should they wish to make contact outside of other study contact points.