Alan C.
"The vast majority of MPs in the house are after all English"

Labour's majority was only maintained by Scottish MPs.
Scottish MSPs voted for free social care, tuition fees, prescriptions and school dinners for their people, and Scottish MPs decided it could not be afforded for the English, but the English have to subsidise the Scottish largesse.

NI, Wales and Scotland have their own assemblies and parliament where the English have no jurisdiction, while their MPs decide on matters that only affect England.
Such injustice threatens the whole Union.