I have been asked to reply
In 1999, Lord Grabiner QC, was asked to chair a task force bringing together the Treasury, the Inland Revenue, Customs and Excise, the Department of Social Security and the Employment Service to conduct an investigation into the informal or hidden economy. His report, "The Informal Economy—A Report by Lord Grabiner QC", was published in March 2000 and is available in the Library. DWP has successfully acted on all the key recommendations applicable to this Department.