From a collapsed sewer under a lucrative holiday home in Blackpool, to a rain-soaked team in Preston, this episode sees the watermen dive underground and under water as they do all they can to prevent upheaval for customers, come rain or come shine.

Residents in Manchester face a year of noise and chaos as storm tanks are put in place to deal with excess waste caused by heavy rain, and despite three months' worth of notice and a chance to voice concerns ahead of the work starting, locals are less than pleased when the work eventually starts. Whilst a team in south east Manchester are tackling 30,000 litres of concrete that's been poured down a sewer, a specialist diving team face a technical job at a reservoir as well as a stomach churning waste water task. It's not a job for the faint-hearted. Show less