Despite this, the UK Government awarded Serco the £276 million contract for Brook House and Tinsley House in 2020. The ‘Brook House Inquiry’ concluded that G4S had earned a 20% profit margin by systematically cutting back on its workforce numbers. “The first night in Brook House, I discovered my cellmate was brewing 15 litres of vodka in his cell. More than half of the detainees at Brook House are not removed, but released back into society, according to the Independent Monitoring Board. She was appointed as an expert in the Brook House Inquiry and is the author of the recently published book “Supply Chain Justice”.