Amended constituency boundary proposals will mean the political map in the heart of Cornwall will be "substantially different", officials have warned.
The Boundary Commission for England yesterday published details of the impact of slashing the number of MPs by 50 to 600. The Lib Dems have said they will pull the plug, however. Between Devon and Cornwall, 18 seats would be reduced by one.
As reported in the Western Morning News yesterday, a cross-border Devon and Cornwall seat could remain, christened Bideford, Bude and Launceston to reflect the three main towns in the constituency.
But much of Cornwall will get a makeover with the Truro and Falmouth and St Austell and Newquay seats re-configured, and North Cornwall swallowed up by the new "Devonwall" constituency.
Last September, commissioners proposed a Truro and St Austell seat in the south – taking in two of Cornwall's biggest conurbations – and another called Bodmin and Newquay in the north.
But that has now changed, creating two brand new seats – Bodmin and St Austell, which includes Mevagissey, Padstow and Wadebridge, and Truro and Newquay, which would also boast Perranporth and St Agnes.
North Cornwall Lib Dem MP Dan Rogerson says a constituency lumping Padstow on the north coast with St Austell in clay country "makes no sense".
In Devon, the revised Tavistock and Plympton seat swaps Ivybridge for Okehampton, while the Totnes constituency will be re-named South Devon.
Totnes Tory MP Sarah Wollaston said: "As the new constituency boundary will now include the whole of the South Hams as well as southern Torbay, extending to Holne on Dartmoor, I think it is absolutely right that the name of the constituency will change to 'South Devon'."