This was a UK-wide survey of office workers working from home (WFH) supported by the STUC and other unions. This inquiry was conducted because WFH was not a passing phase. With workers WFH for many months and facing many more, if not permanently, robust evidence was urgently required of their experiences. In late-2019, around 5% of UK workforce WFH. By April 2020, 43.1% were WFH, declining to 25% in August, rising again to 40%+ in early 2021.