HMRC has commissioned research from TNS-BMRB to measure the customer experience of dealing with HMRC. The survey has been running since 2008 and covers customer perceptions of a recent dealing relating to self-assessment.The headline measure of customer experience is published quarterly on the HMRC website. A full report of HMRC and Line of Business results (2008-10) has also been published on the HMRC website:"http://www.hmrc.gov.uk/research/report108.pdf"