Defra and the Animal and Plant Health Agency have confirmed that England has entered the 2026 to 2027 bluetongue season with three BTV-3 cases logged since 1 July 2026. There are no confirmed cases this season in Wales, Scotland or Northern Ireland, but the update published on 15 July puts summer livestock health firmly back into the UK’s biosecurity picture. WOAH describes bluetongue as a midge-borne viral disease of domestic and wild ruminants rather than a directly contagious disease, which is why weather, vector activity and animal movements shape the response. (gov.uk)

The latest confirmations show how mixed the clinical picture can be. Defra said a ewe in Staffordshire tested positive on 10 July after showing head swelling, drooling, crusty nostrils and lameness, making it the first confirmed infection of the summer. Four days later, two calves in Cheshire born blind and unable to stand properly also tested positive, alongside a cow in Devon with crusting around the muzzle, reddened swollen eyes and reddening of the teats. (gov.uk) Defra’s signs guidance shows why those July cases do not all look alike. Sheep are more likely to show obvious signs such as ulcers, drooling, swelling and lameness, while cattle can present with muzzle crusting, reddened eyes, teat lesions, fever or milk drop. Calves and lambs infected before birth may be born small, weak, deformed or blind, so early reporting matters as much as treatment planning. (gov.uk)

Defra says the midges that spread bluetongue became active again on 31 March 2026, and recent warm weather has now pushed cumulative temperatures high enough for the virus to develop inside the insects and pass on to more animals. The same bulletin says temperatures in parts of nearby continental Europe are also now high enough for infectious midges, lifting cross-border pressure at the very point when British farms are heading deeper into peak vector season. (gov.uk) That science is not abstract. A 2024 review in Frontiers in Virology found high Culicoides activity between April and November, with more than 80 per cent of annual midge catches recorded from June to September. In June 2026, ECDC and EFSA said updated VectorNet maps are helping authorities track shifts in the distribution of biting midges across Europe, underlining why seasonal disease planning now needs to follow weather as closely as paperwork. (frontiersin.org)

The official risk assessment still rates bluetongue incursion into England from all routes as medium, while calling airborne incursion negligible. Defra also notes that infection can move through germinal products such as semen, ova and embryos, which is one reason breeding programmes sit inside the control response, not outside it. For dairy, beef and sheep units, this is less a story of panic than timing: the virus exploits warm spells, animal movements and breeding windows that are already central to farm business decisions. (gov.uk)

The regulatory picture is lighter for some routine movements but tighter where the risk is judged higher. The whole of England is now a bluetongue restricted zone, yet animals can still move within England without a specific bluetongue licence or pre-movement testing. Wales has had an all-Wales restricted zone since 10 November 2025, allowing livestock to move between England and Wales without extra vaccination or mitigation rules, although donor animals for germinal products still need testing. Movements from restricted zones to Scotland must comply with general licence EXD608(EW), with those controls due to remain in force until at least 9 September 2026. (gov.uk)

History explains why farmers are treating this as a standing summer pressure rather than a one-off alert. Great Britain recorded 348 bluetongue cases in the 2025 to 2026 season, including 324 in England and 24 in Wales, while Northern Ireland recorded five confirmed BTV-3 cases. The previous season brought 163 cases across England and Wales, and the 2023 to 2024 outbreak marked the UK’s first BTV incursions in more than 15 years. (gov.uk) The practical response is clear enough. Defra and APHA advise keepers to stay alert to signs, source livestock responsibly, maintain strong hygiene, consider housing animals away from biting midges at dawn and dusk where possible, and discuss vaccination with a vet. Three BTV-3 vaccines are authorised for UK use, vaccine use must be reported, records must be kept for at least five years in England, Wales and Scotland, and vaccinated animals should not be tested within seven days because false positives are possible. (gov.uk)