This review of single homelessness in the UK is extremely timely. It is now over a decade since the Crisis Bricks Without Mortar 30-year review of single homelessness in the UK, and also since the review of single homelessness research which I led for the Joseph Rowntree Foundation and CRASH in 2000. This new review covering the period 2000 to 2010 is a substantial and thoroughly-evidenced piece of work, and is certainly more ambitious than my own single homelessness review, covering as it does policy and practice developments as well as research.