This report summarises the findings of a study into lesbian, gay, bisexual and transgender (LGBT+) employee networks within the NHS. Funded by the Economic and Social Research Council, the research was carried out by the University of York in partnership with NHS Employers, Stonewall and Employers Networks for Inclusion (enei) and generates a comprehensive picture of LGBT+ employee networks and their operations. Drawing on surveys of NHS trusts, over 4000 NHS employees within trusts in England, and 9 case studies of LGBT+ networks in NHS organisations in England (7), Scotland (1) and Wales (1), comprising observations of network activities (45) and interviews (66) with network members (45), HR representatives (5), EDI leads (8) and chief executives (8), the report addresses the purpose and function of networks; composition of members; sustainability of networks and their impact.