The first episode of a new BBC Wales four-part series highlighting the work done by night shift workers in Wales will focus on a local fisherman.

Voiced by comedian Elis James ‘Nightshifters’ which will be aired on BBC One wales tonight (Friday) at 7.30 pm, takes viewers into this little known, unseen world to uncover what it’s really like to work from dusk until dawn at workplaces across Wales.

Wales has one of the highest percentages of night shift workers anywhere in the UK.

While most people are fast asleep in their beds, there’s an army of unsung heroes working all night long.

Off the coast of Tenby, fisherman 41-year-old Gavin Davies, who fishes out of Saundersfoot, and his crew are sailing 70 miles through the night, in search of whelks.

While sea snails aren’t popular with British tastes, this delicacy is in great demand in Japan and Korea, valued for its aphrodisiac powers.

The crew are chasing the sunrise and need to haul a ton of the molluscs before dawn. But tonight they’re fishing in troubled waters and just three hours into their shift, the boat’s engine unexpectedly cuts out.

They’re five miles from land, it’s pitch black, and the stormy weather is closing in.