IIRC, they've been big on climate change denial in the past. That would seem to serve more of a corporate interest than the particular demographic you describe.
Fair point. I'd have to do a bit more work to fit that into my theory.
I think that climate change denial does have a constituency beyond just those who actually own fossil fuel companies, though. It's not hard to persuade ordinary people - particularly a certain strand of the working class and lower-middle-class - who consider car ownership and use to be a marker of wealth and success, that that kind of 'freedom' is under threat from attempts to address climate-change. When those corporate interests have the money to push that agenda, they are partly pushing at an open (car) door.
But the Daily Mail pretty much led the campaign to impose a levy on plastic shopping bags, for example - because that kind of 'environmentalism' is something that appeals to their readership, who don't like seeing their pretty villages littered with discarded bags.
While I'm on the topic, in my opinion, the saving-grace of the Mail is that its readership, being what they are, tend to strongly dislike criminal thuggery or disorder. Which is why it often surprises by expressing sympathy for the victims of criminal violence - even when the victim is a member of a group the Mail usually dislike. The most famous instance by far being its stand in the Stephen Lawrence case, when it named the suspects, IIRC risking legal concequences for doing so. The Lawrences were as 'respectible' a victimised family as you could hope to find, I think they even had a personal connection to the then Daily Mail editor, the father having done building work for him, so the Mail naturally sided with them over the racist
lumpenprole criminals.
I could also point at reports like one on an elderly Muslim guy who got assaulted in the street (in my neighbourhood) or another involving someone on disability benefits who was murdered by an angry white yob (who mistakenly thought he'd been rude to his girlfriend). Or others where the victim was an asylum-seeker or gay or Polish. I feel like that distaste for yobbery in all its forms is why it can never quite be a house-paper for the far-right.
I find the Express to be far worse. It doesn't even have the budget or journalistic competency that the Mail has (it carried the stupidest climate-change-denial article I have ever seen, for example - a list of 'reasons not to care about global warming', which were a mixture of untruths, complete irrelevances, and utter 'not even wrong' nonsense.)
(The Express is also aimed largely at angry pensioners without much formal education, a slightly different demographic from the younger and more female Mail readership, and that really shows in the content of each paper - the Express seems particualrly fascinated with any story that might scare old people to death, while the Mail is weridly obsessed with celebrity women's bodies, particularly any imperfections thereof)
I mean there's a history there, of how the Mail began, and how it was aimed at the rising class of newly-educated 'clerks', the 'respectable' working class.
Of course, as with the Nazis in their own time, the crunch can arrive when the Daily Mail demographic start to fear thuggery is on the rise anyway, and want a 'strong man' to protect them from it.