CORNWALL'S economic performance is now the worst in the UK, official figures have revealed.
The county has slipped behind West Wales and the South Wales valleys in economic output.
Cornwall's position has now deteriorated in comparison to all other areas, and it is the poorest part of the UK.
The statistics show that in Cornwall and the Isles of Scilly gross value added (GVA), the measurement linked to gross domestic product (GDP), went down in 2012 to 61.2 per cent, compared with 62.5 per cent in 2011.
Mebyon Kernow blamed central government's complacency for the county's situation.
The party's economy spokesman Councillor Andrew Long said: "It's a sad indictment of the priorities of the London parties that, while the UK economy grew by 4.2 per cent in 2011-12, Cornwall's gross value added, the standard measurement of economic performance, dropped by 3.3 per cent.
"This means that, when indexed against the rest of the UK, we are just 61.2 per cent of the average.
"We have now dropped below the other area that has been suffering, West Wales and the Valleys, and now sit bottom of the table of the 37 areas of the country. Despite three rounds of assistance from the European Union, we're still struggling to gain an economic foothold and it's a reflection of the lack of concern from the Westminster government for the people of Cornwall that we sit where we are.
"We need to gain real control of the next round of European funding to ensure that we target this regeneration funding into creating a sustainable, dynamic and local economy."
Cornwall's total GVA in 2012 was £7 billion, down 0.3 per cent on 2011, a period when in the UK as a whole it rose by 1.7 per cent.