The owners of a house plagued by series of mysterious screams have fled and vowed never to return to their home.

Alan and Christine Tait believe the recordings they have made inside the property suggest the house is hiding a dark, sinister secret.

But police have not been able to identify the sound of screaming coming from underneath the basement.

On a June evening in 2018, Christine was making a coffee in the kitchen at the house in Ammanford, Carmarthenshire.

But while she was stood over the kettle, she became convinced she could hear strange noises.

The entrance to the abandoned house (
Image:
Robert Melen)
The kitchen above the basement where the noises were heard (
Image:
Robert Melen)

Over the coming weeks, the couple were disturbed by the sounds of women and children screaming, heavy knocking and men talking a foreign language.

Although they had lived in the house for 11 years, within weeks the couple left and vowed never to return.

The couple, who are now living in a camper van, set up recording devices around the house to investigate the noises.

"It was like a flushing noise that I heard first," Christine told Wales Online .

"I told Alan about it and that I couldn't figure out where it was coming from. He left his phone in the bathroom with the recorder on to try to pick up the source of the noise, and then we could hear a machine running.

"We started to record all over the house, and we picked up the sounds of chains, a motorbike starting, and people screaming."

The Taits, both 62, soon realised the noises were subterranean and appeared to be coming from underneath the basement that sits below the kitchen.

The couple left the property last year (
Image:
Robert Melen)
The Taits are convinced something sinister is happening (
Image:
Robert Melen)
Alan and Christine are too frightened to come home (
Image:
Robert Melen)

Determined to get to the bottom of the mystery, Alan dug two 1.5 metre channels into the walls and placed recording equipment inside the shafts.

He said the sounds he picked up included "a woman screaming, sexual sounds, dogs barking, a printing press running, a motorbike, a car horn honing and what sounds like a police siren".

The couple have accumulated hundreds of hours of recordings of the different sounds, all of which they claim are coming from beneath their house.

The pair now travel around the UK warning others about their ordeal and trying spread the word about "what is going on" in Ammanford.

"Hundreds of people have been in touch with us and agreed that this needs to be properly looked at," said Alan.

"All I really want is an explanation. Why are there people screaming? There must be something going on. We have placed microphones all over the place because we wanted to prove or disprove what we were hearing.

The alleyway leading to the property (
Image:
Robert Melen)
The Taits now live in a camper van and are concerned for their safety (
Image:
Robert Melen)

"Were these noises coming from the main road? Were they coming from a park?

"We put microphones at the front of the house, at the back of the house, inside and out, and in the basement.

"The device we left in the basement picked up the screaming and other noises. The other devices, which were recording simultaneously at the front and back of the property, picked up nothing at all."

The couple sent Wales Online a key to the house, but warned reporters would be entering the property at their own risk.

Despite being in a busy town centre, the property is hidden down a narrow and lonely alleway. The street is filled with shops and other commercial properties, bar one empty building next door that is up for sale.

The kitchen sits directly above the now sealed-off basement. There is no direct access to the underground space, other than down a small hole with nine feet of darkness below it.

Although the journalists left a recording device at the edge of the hole for several hours, the only sound picked up was them leaving the property.

However, the Taits  - who recorded inside the walls of the basement, rather than above a hole in its ceiling - are adamant something is going on and have set up a petition to demand authorities investigate further.

Police said there was no evidence of wrongdoing (
Image:
Robert Melen)
Reporters were told they could visit the property at their own risk (
Image:
Robert Melen)

They claim police are ignoring their concerns and that "this matter needs an urgent, full investigation".

Dyfed-Powys Police has confirmed that they have received correspondence from Alan and officers attended the area in November last year. They did not find evidence of wrongdoing.

But the Taits believe there are men, women and children living, sleeping and working underneath the house.

Alan believes there are "quite a lot of people down there" and is concerned it could be connected to people trafficking as well as drug manufacturing.

The couple refuse to return to Ammanford and say they are fearful for their own safety. They would not say where in the UK they currently live and did not want photographs of themselves in the press.

"We're travelling around the country handing out posters and fliers about what we think is going on," said Alan.

"We want as many people as possible to know about this so that the police are urged to carry out a more thorough investigation.

"We don't want to go back until the matter has been resolved.

"I think we're dealing with a serious criminal gang here, and I think our lives could be in danger if they knew where we were."