The Public Accounts Committee (PAC) held an oral evidence session on HMRC's performance, on Monday 30 April 2018. The witnesses were Jon Thompson, Permanent Secretary, HMRC, and Jim Harra, Second Permanent Secretary, HMRC. Chair Meg Hillier, Labour, opened the hearing by comparing this ‘catch-up’ session with HMRC to the BBC show Mastermind, given the likely range of questions on taxation by MPs directed towards the tax authority’s representatives