I will say, something quite similar as a hangover remedy is pretty much a tostada that has refried beans, then ranchero (read - barely cooked) eggs, then chorizo with some delicious salsa to smother. But that is actually good and flavorful.
No black pudding? There's a place on Holloway not far from the Emirates that has amazing coffee and instead of baked beans and sausage, they substitute fried halloumi and bacon. Deeeelicious.
I It was just one of the first pictures I saw from a google image search of full english breakfast with baked beans. In truth a 'full english breakfast' is something of a movable feast, (npi), which can include quite a few different things. I've had it with black pudding but also with white pudding... https://en.wikipedia.org/wiki/White_pudding Not sure about Halloumi but, tbf, that might be because I'm not even sure what Halloumi is without searching
I see no diff between canned Heinz and canned, say, Hunt's, Van Camp's or Del Monte. Stuff you scarf down with a hot dog, from a styro cup in the car.
They make up for it with sausage that tends to be (far, far) better than anything you find here. That tomato adds some flavor as well. Usually, eggs are sunny side up, but I prefer scrambled too.
Soak em, molasses, brown sugar, maybe an onion and a generous hunk a salt pork. There are very very few things in a can that's close to scratch!
Yeah, I forgot to mention soaking. They wouldn't even have to do it daily, as beans will keep (and are often better on day two anyhow).