Wild Thing I Love You from Channel4.com

Slebech Park, Wales, is home to a large mixed colony of bats, including 200 rare greater horseshoe bats

Work has recently started on the laying of a massive gas pipeline just north of Slebech Park

Greater horseshoe bats and long-eared bats need the hedgerows to navigate from their day roosts in the park to their feeding grounds at night

Laying the gas pipeline involves cutting 30-metre gaps in 21 hedges

Jem breaks the bad news. If the bats are to survive at Slebech Park, they must patch up the hedge gaps within 48 hours

The team must work out which hedgerows are the most used flight paths, so Bill gets practicing with a bat detector that picks up bats

A team of bat detectives arrive. They net a horseshoe bat and fit a radio tracker to it

Once the radio trackers are fitted, the bats are released back into the hedgerows

Jem has quite a job keeping up with the bats, but the two main flight paths are identified

Dusty, Sasha and Bill head out into the night with a moth trap to see where the best bat feeding grounds are. And they do indeed match up with the flight paths

As a long-term solution, Dusty sets about digging a pond closer to the bats

Meanwhile, Sasha gets to work nailing bat boxes in the vicinity of the new pond

Jem has been hard at work building a mobile hedge so that the builders can plug the gap at night and remove it again in the morning

The hedgerow on the second flight path is kept intact with stakes draped with a fine netting and dressed with foliage

Bill loses a fiver to Jem when the bat detector picks up a horseshoe bat navigating along the mobile hedge. The solution works!