[1] UCL, Ctr Outcomes Res & Effectiveness CORE, Res Dept Clin Educ & Hlth Psychol, 1-19 Torrington Pl, London WC1E 7HB, England
[2] Camden & Islington NHS Fdn Trust, iCope, St Pancras Hosp, London NW1 0PE, England
[3] UCL, Res Dept Clin Educ & Hlth Psychol, ADAPT Lab, Gower St, London, England
[4] Barnet Enfield & Haringey Mental Hlth Trust, Enfield & Haringey Psychol Therapies Serv, Lets Talk IAPT Barnet, London, England
[5] East London NHS Fdn Trust, Newham Talking Therapies, Vicarage Lane Hlth Ctr, London E15 4ES, England
[6] North East London Fdn Trust, Waltham Forest Talking Therapies, Thorne House, London E11 4HU, England
[7] North East London Fdn Trust, Barking & Dagenham & Havering IAPT Serv, Church Elm Lane Hlth Ctr, Dagenham RM10 9RR, Essex, England
[8] North East London NHS Fdn Trust, Redbridge Talking Therapies Serv, London, England
[9] Homerton Univ Hosp NHS Fdn Trust, Talk Changes City & Hackney IAPT Serv, London, England