Using data from specialist homelessness agencies, this bulletin examines four cohorts vulnerable to homelessness and the differences in the housing outcomes both across and within the groups. It seeks to better understand why some people in these groups may retain or attain housing while others become or stay homeless. It is expected that well known factors which make people more vulnerable to homelessness will also be key factors in their housing outcomes following support. This bulletin seeks to confirm that this is the case and also provide an indication of the extent of the impact of these factors.