The Government will press ahead with a vote on re-drawing the parliamentary map – which could create a "Devonwall" MP – despite Liberal Democrat opposition that could scupper the plans, David Cameron has said.
Lib Dem leader Nick Clegg has told his MPs not to back legislation that will slash the number of MPs from 650 to 600 in retaliation to Tory resistance to House of Lords reform. The move would have given birth to an MP straddling the Devon and Cornwall border, which is fiercely opposed by Cornish nationalists.
But despite not having enough Conservative MPs to support the plan in Parliament, which would also make constituencies the same size, the Prime Minister has said a vote will happen in any event.
He said: "This vote is going to come before the Commons and the Lords. The work is being done. The legislation has been passed. All that remains is these last two votes.
"And when they come forward I will urge MPs of all parties – Labour, Liberals, DUP, SDLP, Plaid Cymru – anyone that believes (to support it).
"Go and ask your constituents, I would say. Do you want a smaller House of Commons that costs less money, that all seats should be the same size, with the same number of voters in?
"If anyone can find me an argument for different numbers of voters I would be very interested to hear it."
The Boundary Commissions for England and Northern Ireland, after wide-ranging consultations, will on October 16 publish amendments to their initial scheme.