Sewermen

In Cumbria, an army of engineers are replacing parts of an ageing monster underground pipeline that transports millions of litres of water from Haweswater Reservoir to 2 million people every day.

Waste Warriors James and Andy battle to clear a newly formed fatberg underneath a busy street in Manchester. It is a monstrous mass of waste and fat that is 50 metres in length

In Cumbria, John and his army of engineers are midway through a mammoth plumbing job, replacing parts of an ageing monster underground pipeline

Geoff and his elite squad of sewage cleaners must scour the pumps deep inside a holding tank at Southport Treatment works, to ensure the waste doesn't back up into people's homes

Project director John and his team undertake a crucial test at a fresh water pipeline in the Lake District, and a garden in Rucorn, Cheshire, is being slowly submerged in sewage.

On-the-road engineers Steve and Mark are called to a block of flats where a pile of excrement has erupted out of a manhole onto the lawn, and the amount of waste is daunting.

In rural Cheshire, the water for a local community has to be shut off while engineers lay a new pipe, so clean water responder Eric is mobilised to provide an emergency supply

Two miles off the coast of Blackpool, specialist divers are on an underwater mission to clean a massive submerged outfall pipe that disperses treated wastewater deep into the sea. Water tester Annette is out in harsh Cumbrian weather to perform vital checks on the water quality in her area and sewage supremos Mick and Ash race to the aid of a family whose backyard is swimming with sewage from a bunged-up manhole