The largest number of Schmallenberg virus cases have been reported in eastern counties - in Suffolk, Norfolk, East Sussex and Kent - but the disease has been found as far west as Cornwall.
Positive cases have recently been identified on the Isle of Wight and in Wiltshire, West Berkshire and Gloucestershire, while other counties including Essex, West Sussex, Hertfordshire, Surrey, Hampshire have also seen cases.
More top news
Clear and cooler conditions to the south and east with lows into single figures.
Police have arrested three teenagers and a man following the shooting of a three-year-old girl with an air gun.
Police have released new images of the site of the fatal crash near Shoreham Airshow in which at least 11 people died.