The badger is discarded and the terrier re-entered into the sett.

Shortly after the baby badger is seen to be still alive and is killed by Young hitting it with a shovel.

Chief inspector Ian Briggs, from the RSPCA’s special operations unit, said: “The RSPCA’s special operations unit has to investigate some truly gruesome acts on animals. But the prolific nature of these horrific crimes are some of the worst I – and my inspectors – have ever had the displeasure of witnessing.

“This barbaric, deliberate and calculated torture has caused wildlife and dogs to suffer immeasurably, solely for the sadistic pleasure of a handful of depraved individuals.

“BBC Wales’ initial work on this case was very important, and firmly in the public interest – paving the way for the RSPCA to undertake this investigation and bring these perpetrators to justice.

“Sadly, people who enjoy inflicting such pain and suffering on wildlife continue to offend in Wales. The RSPCA will not rest in bringing people like these to justice.

“As well as BBC Wales, we’d also like to thank the police forces who assisted us on this case – Gwent Police, South Wales Police, Dyfed Powys and Gloucestershire Police.”