back bench
noun /ˌbæk ˈbentʃ/
/ˌbæk ˈbentʃ/
[usually plural]- (in the House of Commons in the UK, and in certain other parliaments) any of the seats for Members of Parliament who do not have senior positions in the government or the other parties
- He resigned as Home Secretary and returned to the back benches.
- back-bench MPs