Trident in Milford, constituency boundary changes - two ideas that must have seemed like good, clinical strikes at the time have turned into rather more uncomfortable homing missiles.

BBC: Clinical strike or homing missile?

Mr Baron believes a referendum "may be an increasingly attractive option" for the prime minister, since the Lib Dems effectively torpedoed plans for constituency boundary changes, which Conservatives had hoped would help them win more seats.

BBC: EU referendum: Cross-party campaign launched

Under the new law on constituency sizes, the Boundary Commission says Cornwall will inevitably have to share an MP with Devon in some form.

BBC: Boundary changes could impact Cornwall-Devon border