So iodine, which prevents goitre, is routinely added to salt and vitamins to breakfast cereals.

ECONOMIST: In praise of omega-3s

Colin Evans, who farms at Pant y Goitre farm in the Usk Valley in Monmouthshire, said between 20 and 25 lambs born to his 800 ewes appeared to have been affected by Schmallenberg - up to 5% of the flock.

BBC: Schmallenberg virus cases increase in Welsh lambs