A look at the smaller boats that fish off Cornwall's coast, often with only a single crew member. Despite being a sustainable method of fishing, this traditional approach is coming under threat from industrialisation, a lack of new talent taking up the trade, and declining stocks of mackerel and other once common fish. In Penberth, James is the only fisherman under 65 - and since traditional methods rely on boats supporting each other, he may have to give up when the older generation retires. On the Helford River, a veteran fisherman shares his concerns for the fish processing industry if Britain leaving the EU leads to a decline in foreign labour.