Farming

‘False positives’ must be eliminated

Published

11 years ago

March 12, 2015

New bovine TB tests needed?: Cambridge University has recommended

A NEW study performed by researchers from Cambridge University has recommended that new tests are needed to make vaccination against bovine tuberculosis (bovine TB). The report points out that in order for vaccination to be viable, the number of false positives from these tests must be significantly reduced. The scientists have said the reduction in false positives in cattle is feasible, but that a vaccination programme would be challenging. Despite an intensive, and costly, control program in the United Kingdom, bovine TB persists. Although vaccinating cattle with the human BCG vaccine offers some protection in cattle, doing so is currently illegal within the EU, due to the vaccine’s interference with the skin test used for surveillance.

The Cambridge team worked alongside researchers at the government’s Animal & Plant Health Agency (APHA), to show the importance of specificity – the proportion of uninfected animals that test negative – to making disease control strategies work. The skin test currently in use has a very high estimated specificity of over 99.97%, which means that less than three animals in 10,000 will test falsely positive. However, the test as carried out in Great Britain is thought to have at best an 80% sensitivity – a measure of how many infected animals will correctly test positive – missing around 1 in 5 bovine TB-infected cattle. It is used to determine if animals, herds and countries are officially free of bovine TB.

Vaccinated animals that test positive have to be treated as infected animals. Under European law, if an animal tests positive, it must be slaughtered. The remaining herd is put under movement restrictions and tested repeatedly using both the skin test and post-mortem examinations until it can be shown to be officially clear of infection. Researchers said the duration of movement restrictions is important due to the considerable economic burden they place on farms. Also, the cost to the UK government alone is estimated to amount to half a billion pounds over the last decade; this cost includes visits to farms by veterinarians, tests carried out and compensation for the slaughter of infected animals.

For vaccination to be economically viable and acceptable within the EU, the benefits of vaccination must be great enough to outweigh any increase in testing. A new generation of diagnostic tests, known as ‘Differentiate Vaccinated from Infected Animals’ (DIVA) tests, has opened up the opportunity for the use of BCG within current control programmes. The EU has recently outlined the requirements for changes in legislation to allow cattle vaccination and a recent report from its European Food Safety Authority (EFSA) emphasized the importance of demonstrating that BCG vaccine works, and that DIVA tests can be shown to perform in large-scale field trials.

However, a key factor overlooked in the EU report was that the currently viable DIVA tests have a lower specificity than tuberculin testing; this could lead to vaccinated herds being unable to escape restrictions once a single test-positive animal has been detected, as the more times the herd is tested, the more likely the test is to record a false positive. In their study, the researchers from Cambridge and APHA used herd level models to show that the level of infection can be reduced in vaccinated herds even when DIVA sensitivity is lower than tuberculin skin testing.

However, in order to see this benefit of vaccination over 99.85% of uninfected animals will need to test negative in the DIVA test. This improved accuracy will be necessary to avoid increasing the duration of breakdowns and the number of animals condemned. Using data from previous tests on cattle, the researchers said this level of ‘specificity’ is achievable, though they said there will be challenges associated with improving accuracy. The researchers said, “Currently, there is no gold standard test to diagnose TB in cattle. Cattle that test positive are slaughtered immediately and therefore have rarely developed any physical signs – in fact, only around a half of animals examined post-mortem show physical signs of infection even if they are, indeed, infected.”

Dr Andrew Conlan from the Department of Veterinary Medicine at the University of Cambridge explained “In order for vaccination to be viable, we will need a DIVA test that has extremely high specificity. If the specificity is not good enough, the test will find false positives, leading to restrictions being put in place and a significant financial burden for the farmer. “But validating a test that has a very high specificity will in itself be an enormous challenge. We would potentially need to vaccinate, test and kill a large number of animals in order to be confident the test is accurate. This would be very expensive.”

Farming

‘Poor decision’ New Creamston housing condition overturned

Published

6 hours ago

December 4, 2025

Bruce Sinclair - Local Democracy Reporter

A “POOR DECISION” agricultural worker-only imposed nearly 40 years ago has been removed from a Pembrokeshire property by county planners.

In an application recommended to be approved at the December meeting of Pembrokeshire County council’s planning committee, Tim and Cathy Arthur sought permission for the removal of an agricultural worker-only condition at New Creamson, Creamston Road, near Haverfordwest.

An officer report for members said the agricultural condition was imposed when the dwelling was built in 1988/89, with a later certificate of lawful development granted this year after it was proven the site had been occupied for more than 10 years on breach of that condition.

An application for a certificate of lawfulness allows an applicant to stay at a development if they can provide proof of occupancy over a prolonged period.

Speaking at the meeting, agent Andrew Vaughan-Harries of Hayston Developments & Planning Ltd told members the original agriculture-only condition was a poor decision by planners back nearly four decades ago.

“When this application was made in 1988-89 we go back to the Preseli District Council – I was still in school – it was only a 50-acre farm, it should never have been approved as it shouldn’t have been viable.

“The current applicants have owned it for the last 20 years; they’ve tried to grow apples but couldn’t make a go of it and then went in to holiday lets. We can’t enforce redundant conditions from bad decisions made years ago.”

Approval was moved by Cllr Brian Hall and unanimously supported by committee members.

Business

Cwm Deri Vineyard Martletwy holiday lets plans deferred

Published

20 hours ago

December 4, 2025

Bruce Sinclair - Local Democracy Reporter

CALLS to convert a former vineyard restaurant in rural Pembrokeshire which had been recommended for refusal has been given a breathing space by planners.

In an application recommended for refusal at the December meeting of Pembrokeshire County Council’s planning committee, Barry Cadogan sought permission for a farm diversification and expansion of an existing holiday operation through the conversion of the redundant former Cwm Deri vineyard production base and restaurant to three holiday lets at Oaklea, Martletwy.

It was recommended for refusal on the grounds of the open countryside location being contrary to planning policy and there was no evidence submitted that the application would not increase foul flows and that nutrient neutrality in the Pembrokeshire Marine SAC would be achieved within this catchment.

An officer report said that, while the scheme was suggested as a form of farm diversification, no detail had been provided in the form of a business case.

Speaking at the meeting, agent Andrew Vaughan-Harries of Hayston Developments & Planning Ltd, after the committee had enjoyed a seasonal break for mince pies, said of the recommendation for refusal: “I’m a bit grumpy over this one; the client has done everything right, he has talked with the authority and it’s not in retrospect but has had a negative report from your officers.”

He said the former Cwm Deri vineyard had been a very successful business, with a shop and a restaurant catering for ‘100 covers’ before it closed two three years ago when the original owner relocated to Carmarthenshire.

He said Mr Cadogan then bought the site, farming over 36 acres and running a small campsite of 20 spaces, but didn’t wish to run a café or a wine shop; arguing the “beautiful kitchen” and facilities would easily convert to holiday let use.

He said a “common sense approach” showed a septic tank that could cope with a restaurant of “100 covers” could cope with three holiday lets, describing the nitrates issue as “a red herring”.

He suggested a deferral for further information to be provided by the applicant, adding: “This is a big, missed opportunity if we just kick this out today, there’s a building sitting there not creating any jobs.”

On the ‘open countryside’ argument, he said that while many viewed Martletwy as “a little bit in the sticks” there was already permission for the campsite, and the restaurant, and the Bluestone holiday park and the Wild Lakes water park were roughly a mile or so away.

He said converting the former restaurant would “be an asset to bring it over to tourism,” adding: “We don’t all want to stay in Tenby or the Ty Hotel in Milford Haven.”

While Cllr Nick Neuman felt the nutrients issue could be overcome, Cllr Michael Williams warned the application was “clearly outside policy,” recommending it be refused.

A counter-proposal, by Cllr Tony Wilcox, called for a site visit before any decision was made, the application returning to a future committee; members voting seven to three in favour of that.

Farming

Farmers Union of Wales Warns: Labour’s 5G Expansion Risks Rural Blackspots

Published

2 days ago

December 3, 2025

Tom Sinclair

FUW Joins Landowners in Urgent Call to Pause Controversial Telecoms Reforms

THE FUW (Farmers’ Union of Wales) has warned that rural communities face worsening mobile blackspots and farmers risk losing essential income if the Labour Government expands a telecoms policy blamed for stalling Britain’s 5G rollout.

In a letter to Digital Economy Minister Liz Lloyd, the FUW aligns with landowners, investors, and property experts demanding a halt to Part 2 of the Product Security and Telecommunications Infrastructure (PSTI) Act 2022. Extending the 2017 Electronic Communications Code (ECC) would “entrench failure,” the group argues, sparking more stalled renewals, site losses, and legal battles just as Wales needs swifter rural connectivity.

The 2017 reforms empowered operators to cut mast rents—often by 90%—from hosts like farmers, councils, and NHS trusts. Far from boosting rollout, they’ve ignited over 1,000 tribunal cases since 2017, versus 33 in the prior three decades. Rural goodwill has eroded, with hosts now eyeing exits.

“Every lost mast isolates households, schools, and businesses,” the FUW states. “No public subsidy can fix this systemic damage.”

A survey of 559 hosts (via NFU, CLA, BPF) shows:

35% considering full withdrawal.
70% of expired lease holders facing operator legal threats.

Landowner Ted Hobbs in New Tredegar shares the pain: “My 1995 Vodafone lease was £3,500 yearly, renewed in 2010 at the same rate. It expired May 2025—now they demand a slash, backed by the Code. This is confiscation, not partnership.”

Labour’s push forward—despite earlier opposition and a critical consultation—ignores these red flags.

FUW President Ian Rickman adds: “Farmers hosted masts in good faith for rural connectivity. Punishing them with rent cuts sabotages Wales. Halt this now, restore trust, and incentivise real progress.”

The coalition urges ministers to reopen dialogue before deepening rural divides. Wales can’t afford more policy missteps.