This whole nostalgia for fishing in Grimsby strikes me as similar to the nostalgia for the glory days of coal in West Virginia.
Nostalgia? That's an interesting word to describe people's livelihoods. Yes it's reasonable to compare it to mining... Thatcher closed the mines and then started buying coal from abroad, destroying communities across the country.

This isn't about "good old days", it's about entire communities suffering thanks to globalism. If you're a globalist and don't have a problem with it, fair enough, I'm not telling you how you should think economically. But you should still respect people's democratic dignity, you should still understand why communities suffer and why they have a problem with it. If suddenly you were unable to work because someone decided to buy whatever you make or get whatever service you provide from elsewhere without a care about your personal circumstances, if suddenly you couldn't support your family, you'd be pissed off. If you felt leaving the EU would make things better, then you wouldn't be arguing with me about why the EU is so bloody marvelous.

While I'm sympathetic to people losing employment opportunities because times have changed and missing the good old days, they have to understand that we can't just turn back the clock and make everything better. They might have to go find something else to do.
Grismbsy is an absolute shithole. There is nothing there except for fishing. If fishing is done, so is Grimsby. And it's hardly the only fishing community, I refer to this town because it's somewhere I've been, I know how important fishing is to this town.