The following HMRC document describes what they intend to do about tax evasion http://bit.ly/1nmICQi As an illustration they provide several case studies such as the following Case study — surveying jail John William Powell, a quantity surveyor from Kenilworth, was sent to prison for two and a half years for failing to pay income tax. […]

A person who cheats the Revenue obtains a pecuniary advantage as a result of criminal conduct within the meaning of section 340(6) of POCA. Despite Court of Appeal in R v. Gabriel (Note) [2007] 1 WLR 2272, the proceeds of tax evasion can be criminal property for the purposes of the money laundering provisions: R […]