Having experienced first-hand HMRC’s attempts to combat serious tax losses, one of the features of tax litigation over the last 15 years has been the prevalence of so-called ‘Kittel’ cases. These are cases in which HMRC seeks to deny repayments of VAT to companies buying goods in circumstances where HMRC has identified a fraud further up the supply chain, often many companies distant. They can involve significant amounts of VAT and form a substantial pillar of HMRC’s compliance strategy.