Fraud Squad Series 4 Episode 9 Episode 9 ( Air Date 2022-02-25 ) Genre Documentary, Crime category. Overview "HMRC face the biggest tax fraud investigation in UK history, with over a £100 million of public money on the line. An NHS manager abuses his position, authorising fake invoices for fictional work and pocketing the money, and a newlywed claims she has been jilted, to scam thousands in benefits.".