Thebackbenches are the seats in the British House of Commons where backbenchers sit. The Members of Parliament who sit on the backbenches are also referred to as the backbenches.
[British]
This issue is creating unrest on the backbenches.
backbenches in British English
(ˌbækˈbɛntʃɪz)
plural noun British
1.
seats in the British and some other Parliaments where MPs who are not office-holders in the governing or opposition parties sit
This issue is creating unrest on the backbenches.
She may well enjoy her new freedom to criticize the government from the backbenches.
2.
the MPs collectively who are not office-holders and therefore sit on the backbenches
The speech received a rapturous reception from the government backbenches.