This publication  produced by the CIH Policy and Practice teams across the UK provides information about how Housing First is working across the UK and Ireland, highlights some of the challenges involved in developing Housing First and encourages discussion among housing practitioners.

http://www.cih.org/resources/PDF/Scotland%20Policy%20Pdfs/Housing%20First/CIH0220-PDF-B_Housing%20First_RV_13112017%20FINAL.pdf