Experts say that although an outbreak of the Schmallenberg virus would be bad news for livestock farmers, it is not nearly as bad as a bluetongue outbreak.
Schmallenberg only causes mild symptoms in adult livestock and affects less than a third of newborn animals.
Bluetongue spread to the UK from the Continent in 2007, and prompted an emergency response of widespread vaccination. There were fears it could have killed 25-30% of the country's sheep.
More top news
Tonight will start off clear in many areas, but cloud will increase from the east overnight, bringing some light and patchy rain.
Defending champions Arsenal squeezed into the FA Cup final despite a spirited fightback from Reading, who forced extra-time
A detective who led investigations into the Valley Parade fire tells ITV News there is "unequivocal" evidence the disaster was an accident.