Fifteen cows infected with Bovine TB have been sent to slaughter from a farm in mid-Cornwall.
Policing controversial culls in Somerset and Gloucestershire cost £1,800 for each badger killed.
Dorset Wildlife Trust is vaccinating badgers, which it says is a more humane way of preventing TB, but the NFU says it won't work
The Badger Trust has issued a "pre-action protocol letter" over the proposed eight-week extension of the badger cull in Gloucestershire.
An extra three weeks was granted in Somerset, where 60% of the badger population was culled.
A "pre-action protocol letter" to Natural England and the Treasury Solicitor for the Secretary of State Secretary of State for the Department for Environment, Food and Rural Affairs has been actioned by the Trust.
It is the first stage in seeking a judicial review in the High Court, the letter states:
We consider that the decision to extend the cull in Somerset was unlawful, particularly in the light of those documents.
But given that we have only just seen them and given the relatively shorter extension there, we have advised our clients that it would not now be practicable (given the court process) to seek injunctive relief to prevent it.
But that is not the case in relation to the contemplated decision in relation to Gloucestershire not least because of the much longer extension (eight weeks) being sought (and not yet granted) and the fact that our clients have now seen the nature of the arguments being relied on to justify further culling.
The pilot cull of badgers in Somerset is coming to an end. It started six weeks ago. Marksmen were hoping to shoot around 2,000 badgers, 70% of the population. It's part of the Government's plans to control the spread of TB in cattle.
Half way through the badger cull and the Government says it IS on track. It's got three more weeks to run in West Somerset, but there are claims marksmen aren't killing enough badgers to make the trial scientifically worthwhile.
Today Farming Minister David Heath told ITV West Country the cull will be properly assessed at the end of the trial. Our environment correspondent, Duncan Sleightholme reports.
A charity has claimed photos of a dead badger proves the animals are suffering painful deaths as part of the badger cull. Defra however, says the pictures are not connected to the trials.
– Defra spokesperson
We are confident that this is not connected to the pilot culls.
All badgers killed as part of the pilot culls have been shot cleanly and killed instantly.
The animal rescue centre Secret World in Highbridge, Somerset, says a post mortem on a dead badger (pictured) proves the animals are suffering painful deaths as part of the badger cull. It is the first photo released of a culled badger.
They say that the position of the badger's organs outside its body - which is too graphic to publish - and the fact it was found away from its sett, show that it did not die instantaneously, but ran away mortally wounded.
The rock star and wildlife campaigner Brian May has apologised for using the term 'genocide' to describe the badger cull pilots taking place in the West of England.
The Queen musician's alleged remarks were made during a visit to Gloucestershire last week and caused a backlash among members of the Jewish community.
Writing on his website, May said he could not remember using the phrase "genocide in the countryside," but that he had given some 20 interviews and may have lost track.
May said he had no intention to "slight the Jewish community" but maintained it was "not a very big flight of fancy" to refer to the killing of animals in this way.
"The word I prefer to use about the badger cull is 'massacre' ... because really the word 'cull' is enormously euphemistic," he added.
A dairy farmer and businessman from Weston-super-Mare has claimed the badger cull in Somerset will not succeed due to a failure to shoot enough of the animals.
North Somerset Cllr Derek Mead said only a handful of badgers are being shot daily in the Exmoor culling zone.
He said after two weeks of shooting the total number of badgers killed was 'well below 100', a tiny proportion of the 2,000 needed to be shot if the six-week pilot is to be successful.
He has called for badgers to be gassed instead of shot.
The culls aim to assess if culling can be done effectively, safely and humanely, with plans to roll out the scheme more widely in areas that are hotspots for TB in cattle.
Farmers and the Government insist culling of badgers, which can spread TB to cattle, is needed to stop spiralling rates of the disease in herds.
Gloucestershire Police said four people were arrested in Redmarley in the early hours of Tuesday morning.
- A 46-year-old woman from Cheltenham
- A 34-year-old woman from Gloucester
- A 46-year-old woman from Evesham
- A 23-year-old man from Mansfield in Nottinghamshire
All four were arrested on suspicion of theft and aggravated trespass.
The 34-year-old woman was also arrested on suspicion of possession of an offensive weapon.
Four people have been arrested in Gloucestershire in connection with the badger cull taking place in the county.
All four remain in police custody.