His Majesty the King visited APHA’s York Biotech Campus at Sand Hutton on Tuesday 26 May 2026 to meet the agency’s Wildlife team and review work on an oral contraceptive intended to reduce the impacts of grey squirrels and support native red squirrels. The government news release, published on 28 May 2026, presents the visit as an update on an active research programme rather than as the launch of a new policy or funding package. (gov.uk) That distinction is important for readers following wildlife policy. The visit brings public attention to a piece of state-backed research that already sits within a formal government programme on invasive species control, woodland protection and red squirrel recovery. (gov.uk)
In policy terms, the relevant document is Defra and the Forestry Commission’s grey squirrel policy statement, published on 29 January 2026 for England and updated on 6 February 2026. That statement replaced the 2014 Grey Squirrel Action Plan and sets out a five-year programme to reduce grey squirrel impacts on red squirrels, trees and woodlands. (gov.uk) The same statement records an estimated grey squirrel population of 2.7 million across Great Britain and says the native red squirrel is now classed as endangered in this country. It also sets out Action 3.1, under which government will continue to support research, led by the UK Squirrel Accord and carried out by APHA, into an oral form of fertility control. (gov.uk)
The conservation case is twofold. Forestry Commission guidance states that the grey squirrel is a non-native species first introduced to the UK from North America in 1876, is now widely distributed across most of England, Wales, Northern Ireland and the Scottish Lowlands, and is not a protected species. The same official guidance states that red squirrels are protected under the Wildlife and Countryside Act 1981. (gov.uk) The economic case is also explicit in government material. Forestry Commission guidance estimates that bark stripping by grey squirrels costs at least £37 million a year in England and Wales through lost timber value, reduced carbon capture, damage mitigation and replacement trees. Defra’s 2026 policy statement adds that grey squirrels out-compete red squirrels for food and spread squirrelpox virus, which is usually fatal to reds. (gov.uk)
The legal framework is tighter than the ceremonial framing might suggest. Under section 14 of the Wildlife and Countryside Act 1981, animals listed in Part I of Schedule 9, including the grey squirrel, must not be released or allowed to escape into the wild. Defra’s policy statement says management aims include controlling the existing population, preventing establishment on islands and in red squirrel areas, and using humane measures where outcomes are achievable and benefits are sustainable. (legislation.gov.uk) Official guidance also makes clear that grey squirrel control must comply with animal welfare law. The Forestry Commission states that management must be conducted in line with the Wild Mammals (Protection) Act 1996 and the Animal Welfare Act 2006, and that lethal traps should not be used where protected species such as red squirrels or pine martens are known to be present. (gov.uk)
APHA’s published science shows why the work has taken time. Officials are not simply testing a contraceptive compound; they are also trying to build a feeder and bait system that reaches grey squirrels without affecting other mammals or red squirrels. APHA says the bait must be attractive, stable in different weather conditions, and presented in a form that cannot easily be carried away and hidden by wildlife. (aphascience.blog.gov.uk) The evidence base is now more detailed than the short news release suggests. APHA reports progress in pilot laboratory trials, including infertility in rats fed a contraceptive vaccine and an immune response in captive grey squirrels. It also says data from red squirrel bodyweights suggest a weight-triggered feeder could deliver contraceptive bait to more than 90% of adult grey squirrels while excluding red squirrels, and that a recent prototype trial in Cumbria was accessed only by greys. (aphascience.blog.gov.uk)
The ethical dimension is not peripheral to the project. APHA states that animal work is carried out under the Animals (Scientific Procedures) Act 1986, is reviewed by its own Ethics Committee before studies begin, and is assessed against replacement, reduction and refinement, followed by a harm-benefit analysis. In policy terms, that matters because the government is presenting the programme as a humane alternative to repeated lethal control, while still relying on regulated animal research during development. (gov.uk) Transparency data published by APHA in April 2026 show 72 mild procedures involving grey squirrels and rats in studies completed in 2025, described as wildlife management techniques primarily supporting red squirrel conservation. The same publication says APHA is a signatory to the Concordat on Openness in Animal Research. (gov.uk)
For ministers, land managers and conservation groups, the practical point is that contraception research is being treated as one instrument within a wider control programme, not as a stand-alone substitute for existing action. The 2026 policy statement keeps in place woodland management planning, support through Countryside Stewardship and related schemes, and a requirement that land managers receiving public funding to reduce grey squirrel harm must demonstrate that they are doing so effectively. (gov.uk) The government material published so far does not set a deployment date or announce a change in law. What it does show is continued official backing for a non-lethal option that would still need to move from research into registration and practical field use before it could be adopted more widely. Defra and the Forestry Commission have said they will review delivery of the grey squirrel policy and publish a progress report by the end of 2031. (gov.uk)