1 Research Department of Primary Care & Population Health, University College London, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, UK. Nathan.davies.10@ucl.ac.uk.
2 Research Department of Primary Care & Population Health, University College London, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, UK.
3 Social Care Workforce Research Unit, King's College London, London, WC2B 6NR, UK.
4 Division of Psychiatry, Marie Curie Palliative Care Research Department, University College London, 6th Floor, Wing B, Maple House, 149 Tottenham Court Road, London, W1T 7NF, UK.
5 Barnet Enfield and Haringey Mental Health Trust Liaison Team, North Middlesex University Hospital, Sterling Way, London, N18 1QX, UK.