A MAJOR DEAL HAS BEEN SIGNED ENABLING UK SEED POTATOES TO BE EXPORTED TO CHINA, reports Farming UK. The seed potato export market is worth £90m a year to the UK. China is the world’s largest potato consumer, with demand increasing rapidly. The UK is one of the first western countries able to export seed to China. The Chinese market offers huge potential to UK farmers – recent research by Barclays shows 60% of Chinese people would pay more for a product, purely because it was British.