Ministers and civil servants leaving office are subject to rules regarding appointment in other sectors. These rules, known as the Business Appointment Rules, exist to prevent former civil servants and ministers being able to profit from their knowledge of and contacts within Whitehall, and to prevent any perception of wrongdoing. The Advisory Committee on Business Appointments (ACoBA) administers the rules.

The European Union (Withdrawal) Act 2018 provides Ministers with the power to establish new public authorities to carry out functions currently undertaken by EU-wide bodies. This could result in a range of new regulatory bodies. The classification of public bodies in the United Kingdom in the recent past has been the subject of reform policies set out by central Government, with a focus on reduction of overall numbers and guidance on the justification for the creation of new bodies. Both trends are considered in this briefing.