Scotland, which produces 80% of the UK's seed potatoes, remains free of a disease that has hit European crops, says the Scottish government.

It surveyed 550 potato crops this summer and found Scottish crops unaffected by the Dickeya disease. A small number of non-Scottish crops were ­infected.

Scottish rural affairs secretary Richard Lochhead said Scotland's disease-free status would help ensure potato seed exporters have an advantage "of benefit to them and the wider Scottish economy".