Britain is confronting an extraordinary surge in bluetongue, with confirmed cases in the first three months of the current season already four times higher than the previous three seasons combined. The outbreak carries no known risk to humans or food safety, but its scale raises questions for livestock-producing countries such as New Zealand about changing patterns of vector-borne animal disease
INR Report: Based on reporting by RT HERE
Britain has recorded 2,579 confirmed premises affected by bluetongue during the 2026-27 season, according to official figures from the UK's Department for Environment, Food & Rural Affairs (Defra) and Animal and Plant Health Agency (APHA). The government figures independently confirm the central numbers reported by RT. GOV.UK Pasted markdown
The scale of the increase is striking. Great Britain recorded 348 cases during 2025-26, following 163 in 2024-25 and 126 in 2023-24. The present season therefore surpassed the combined total of those three seasons within roughly three months. The current official breakdown is 2,098 cases in England, 438 in Wales and 43 in Scotland, with no confirmed cases in Northern Ireland. GOV.UK
What Is Bluetongue?
Bluetongue is a viral disease affecting ruminants including sheep, cattle, goats and deer. Unlike diseases transmitted primarily through direct contact between livestock, bluetongue is spread by biting Culicoides midges.
Clinical effects can include fever, swelling, lameness and lesions around the mouth and nose. Severe infections can produce breathing difficulties, abortions, fetal abnormalities, stillbirths and death. Despite its name, the characteristic blue or discoloured tongue is not present in every infected animal.
Importantly, bluetongue does not infect humans and is not considered a food-safety threat. The consequences are primarily animal-health, agricultural and economic.
The outbreak is overwhelmingly associated with bluetongue virus serotype 3 (BTV-3). British authorities report no BTV-8 cases during the current season. The BTV-3 strain responsible for the recent European outbreaks was first reported in the Netherlands in September 2023 before spreading into Belgium, Germany and Great Britain. British authorities say its origin remains unknown. GOV.UK
The Numbers Are Still Moving
This is not simply an accumulated historical total. Britain's outbreak remained active entering October.
On October 2 alone, authorities confirmed 67 new cases in England, 24 in Wales and two in Scotland. Another 890 potential cases were under investigation in Great Britain when the government published its latest figures. GOV.UK
Devon has been particularly heavily affected, recording more than 1,000 confirmed premises. Cornwall, Somerset, Lancashire and Staffordshire have also recorded substantial numbers.
The pressure has become sufficient for the British government to change its response. In September, authorities introduced a system allowing private veterinarians to diagnose obvious clinical cases, with APHA subsequently providing formal confirmation. The measure was intended to reduce delays as case numbers increased. GOV.UK
Movement controls have also expanded. From October 3, all of Scotland became a bluetongue restricted zone, with specific requirements governing movements of susceptible livestock and germinal products. GOV.UK
A Changing Disease Environment
The significance extends beyond one British outbreak.
Bluetongue was historically associated with warmer regions, particularly Africa and southern Europe. Its movement farther into northern Europe illustrates how diseases dependent upon insect vectors can change their geographic range when environmental conditions favour the insects carrying them.
RT attributes the expansion partly to rising temperatures, citing the World Organisation for Animal Health and earlier comments from Pirbright Institute researcher Dr Christopher Sanders that longer periods of midge activity can shorten the interval between transmission seasons and potentially make overwintering of the virus easier. Pasted markdown
That mechanism is important, but temperature alone should not be treated as a complete explanation for Britain's 2026 outbreak. The scale of disease can also be influenced by the circulating viral strain, livestock immunity, vaccination coverage, animal movements, vector abundance and local weather conditions.
Does This Affect New Zealand?
There is no suggestion in the British figures that this outbreak represents an immediate bluetongue outbreak in New Zealand. The more important issue for New Zealand is biosecurity and preparedness.
New Zealand's pastoral economy is unusually dependent upon healthy cattle and sheep populations. A vector-borne livestock disease capable of causing reproductive losses, deaths and animal-movement restrictions could therefore have consequences extending well beyond individual farms.
Britain's experience demonstrates another problem: once a competent insect vector and virus become established together, conventional controls based principally on restricting livestock movements may have limited ability to stop transmission because the vector itself moves independently.
For New Zealand, the relevant lesson is therefore not alarm but surveillance. Changes in the geographic distribution of vector-borne livestock diseases overseas, the movement of animals and biological material, and the potential distribution of competent insect vectors all warrant close attention.
Britain went from 348 confirmed premises during the entire 2025-26 season to more than 2,500 in approximately three months of the following season. Whatever combination of conditions produced that acceleration, it is a biological signal that agricultural nations should not ignore.
Independent reporting. Original context. Credited sources.
Sources
RT – Unprecedented bluetongue outbreak hits British livestock, 4 October 2026
UK Government – Bluetongue: latest situation
UK Government – Government steps up Bluetongue response
UK Government – Bluetongue virus in Europe: updated outbreak assessment