reporter: most people in newlyn don't see this danger. they are deeply embedded in their traditional way of life. jamie maclean is a cook in his own restaurant. he voted for the brexit because he expected that, without e.u. fishing quotas and regulations, fish would become cheaper. but now he's not so certain. jamie maclean: to be honest, it came as a shock. i mean, i voted out, but i thought i'd be in a minority. so for me personally, you know, i was actually quite shocked by the t vote. i didn't think it would happen. i wouldn't describe myself as particularly happy about it. there's a lot of uncertainty. so now the hard work really begins, you know. i don't think it's something to celebrate, it's something to think about and to start working towards the future. reporter: it's clear what cornwall's fishermen plan to do -- work harder, so they can export more fish to france and spain, without interference from brussels. bill jelbert: well, just hopefully everything's looked at a little bit clearer and a bit more fairly. it's actually som

reporter: most people in newlyn don't see this danger.ey are deeply embedded in their traditional way of life. jamie maclean is a cook in his own restaurant. he voted for the brexit because he expected that, without e.u. fishing quotas and regulations, fish would become cheaper. but now he's not so certain. jamie maclean: to be honest, it came as a shock. i mean, i voted out, but i thought i'd be in a minority. so for me personally, you know, i was actually quite shocked by the t vote. i didn't think it would happen. i wouldn't describe myself as particularly happy about it. there's a lot of uncertainty. so now the hard work r really bebegins, you knowow. i don't think it's something to celebrate, it's something to think about and to start working towards the future. reporter: it's clear what cornwall's fishermen plan to do -- work harder, so they can export more fish to france and spain, without interference from brussels. bill jelbert: well, just hopefully everything's looked at a little bit clearer and a bit more fairly. it's actually

this is the bidding for today's catch in newlyn. all the hake, sole, haddock and other fish is sold in an hour, to be trucked to london and across the channel. fish wholesaler matthew stevens supplies top local and london restaurants. five generations of his family have fished off cornwall. his father established their fish merchant business in the 1930s. >> i love doing it. i'm not a sailor, mind. this is quite an exceptional trip for me to be on a boat. >> reporter: thank you. we're very grateful. stevens relies on a mostly eastern european staff, rather than cornish people, to filet and pack his fish. that's one reason he voted to remain in the e.u. >> i'd love to employ 80 cornishmen, you know, but come on guys, where are you? you know, come to me. we've got work here. >> reporter: besides skilled workers, the e.u. has provided stevens money to help grow his business through a match-funding grant which gave him 45% of the money, about $460,000, needed to equip his factory and buy new machinery. in return, stevens was tasked with