When HMRC investigates tax compliance and alleged errors, taxpayers will need to consider whether they have any collateral claims they can pursue against third parties. For example, there may be potential claims against professional advisers as well as indemnities given to the taxpayer in a wide range of commercial contracts. A key issue will be whether the taxpayer has mitigated its loss. This latest podcast in our tax podcast series by Ian Hyde and Katherine King looks at what the duty of mitigation requires and how potential problems can be headed off.