This episode contains distressing themes and descriptions of violence.

This podcast is intended for a mature audience.

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Following the end of World War II, many projects that had been put on hold were resumed.

Truidenveen and Nanquitho, areas between Penzance and Land's End in Cornwall were flooded to create drift reservoir.

The area now known as the Lost Valley was hidden beneath almost 50 feet of water.

The 65-acre reservoir provides drinking water for West Penrith, and over the years, has become

increasingly popular with birdwatchers.

In 2018, record temperatures and a heat wave caused the water level to drop by almost three metres.

The remnants of the Lost Valley were partially uncovered, but three years later, something much more sinister was brought to the surface of drift reservoir.

Welcome to They Walk Among Us, a podcast dedicated to UK True Crime.

This is the 42nd in a series of bonus episodes.

The dull February sky was reflected on the water.

Light grey clouds cast shadows on the west side of the reservoir. Members of the public can access Trouydden Garden by following the pathway from the

car park close to the dam on the Newland River. The garden is on the grounds of a 19th century property.

In spring it showcases bride magnolias and rare plants can be seen all year round.

Ripples in the reservoir's water are often attributed to the rich underwater ecosystem.

When the reservoir was first created, rainbow or wild brown trout were introduced from a fishery,

and they have thrived there ever since.

On the afternoon of February 18, 2021, a local man walking the route around the reservoir noticed something out of

place bobbing on the surface of the water. It appeared to be a coat. Curious, he carefully

manoured himself closer to the water's edge. The man scanned the material, and when he looked at one of the sleeves to his horror,

...