HM Revenue and Customs ( HMRC ) of United Kindom has recently published its latest tax gap estimates for 2014-15, for information please visit the following links:
Main tax gaps report:
https://www.gov.uk/government/statistics/measuring-tax-gaps
Policy paper: Issue briefing: calculating the 2014 to 2015 tax gap:
https://www.gov.uk/government/publications/issue-briefing-calculating-the-2014-to-2015-tax-gap
Statistics relating to estimates of tax gaps:
https://www.gov.uk/government/collections/measuring-tax-gaps