The Department for Environment Food and Rural Affairs says laboratory tests have detected the presence of Bluetongue - which is insect-borne - in one cow.
Defra's website says: "Bluetongue is a very different infection to Foot and Mouth Disease and the strategy to control it is therefore also different. This is not a confirmed outbreak unless further investigation demonstrates that disease is circulating. Bluetongue is a disease of animals. It does not affect humans. This is a disease of ruminants, including sheep, cattle, deer, camelids and goats. It is transmitted by the movement of midges or by movements of infected animals if they are subsequently bitten by midges."