| Robin Caspar Walker | 17 July 2016 | 26 July 2019 |
| Steven John Baker | 13 June 2017 | 9 July 2018 |
| Sue-Ellen Cassiana Braverman | 9 January 2018 | 15 November 2018 |
| Christopher Heaton-Harris | 9 July 2018 | 3 April 2019 |
| Dr Kwasi Alfred Addo Kwarteng | 16 November 2018 | 25 July 2019 |
| Rt Hon James Spencer Cleverly | 4 April 2019 | 24 July 2019 |
| James Philip Duddridge | 27 July 2019 | 31 January 2020 |