One in every 200 children and one in every 500 adults go missing in the UK every year - and Welsh police forces are searching for a new missing person every day.

In a revealing S4C series, entitled 'Ar Goll' (Missing) viewers will be able to be there, in the moment, and relive the efforts of Dyfed-Powys Police in their search for adults and children who go missing all over their patch.

In a series of six programmes, starting on Wednesday, February 27, at 9.30pm, S4C viewers will learn about different police techniques employed to search for missing people in Mid and West Wales.

ITV Wales' production team has had exclusive access to the behind-the-scenes work of some of the Dyfed-Powys Police officers in recent months as part of a force that received more than 3,000 calls reporting missing people last year alone.

In the first programme viewers are given an exclusive, rare look at the day-to-day workings of the control room at the Dyfed-Powys Police headquarters in Carmarthen where staff are there 24/7 responding to 999 and 101 calls.

"Behind every missing person, there's a story, there's a problem. Our relationship with the family is crucial from the outset," said Richard Lewis, Dyfed-Powys Police's Deputy Chief Constable. "It is only in five per cent of all cases that we ask for the public's help, so it is impossible for the public to truly comprehend how much of our resources are tied up looking for missing people."

With an increase in mental health problems, the series also features the tragic life stories of some of the community's most vulnerable people and their families who wait for news about their loved ones. In one programme we follow the story of a young mother who had threatened to commit suicide before disappearing in a country park near Llanelli; the police helicopter service, NPAS, is then called out to try and trace her from the air.

During the series, the camera team also follow the search for a 25-year-old man after he disappeared in the sea off the Pembrokeshire coast, with specialist dogs, the coastguard and fire service all using special techniques as they coordinate their search.

"Dyfed-Powys Police is the largest force geographically in England and Wales. It comprises 4,000 thousand square miles, including large towns and rural areas. So, each area provides a very different challenge," added Deputy Chief Constable Richard Lewis.