What late summer crumpet of cute is this?

“Bank of Dave” is an adorably plucky feel-good story from Across the Pond, a “true-ish” tale of hidebound, class-divided Britain and small town neighborliness and compassion confronting a literal “Old Boy’s Club” of British banking.

It’s a comedy about founding a small-town (OK, “city”) bank in Burnley in the unfashionable “north.” More sweet than funny, more sentimental than silly, it’s a generally cut-and-dried but always-cute account of a Quixotic local fighting a rigged system and a London lawyer seduced by local friendliness, and Def Leppard karaoke.

Intrigued? Do read on.

Burnley is just far enough in the hinterlands that Britain’s ancient, austere and financial-crisis-triggering Big Banks can’t be bothered to make loans that tide over businesses, create jobs and build up the tax base for a small city struggling as “the most underserved in Britain” when it comes to health care and everything else.

Dave Fishwick runs a string of “any color you like, so long as it’s white” business van dealerships who’s become a small-scale lendor to many.

“I’m not a bloody bank,” Dave, given a light twinkle by Rory Kinnear, says to one mate whose business finally turned the corner, leading to a generous payback. Dave’s “profits” go to charity.

“Maybe you should be” is all it takes for this local character — a “natural” salesman, Dave “loves the sound of his own voice” — to take on the British banking heirarchy that caused, as it did in America and much of the world, the 2007-8 financial crisis.

Britain’s “Eton and Oxford elite” are the only ones allowed to run banks. No “new” bank has been chartered in the UK in 150 years. They’re snobby, connected and all powerful, and they’re bungling inbreds, “treating the economy like it were their own bloody casino,” is how Dave puts it.

“Game of Thrones” alumnus Joel Fry plays the junior attorney smarmed and arm-twisted into taking on the business of filing the paperwork to the nation’s Financial Regulation Board, a fool’s errand, his amusingly unctuous boss (Angus Wright) insists.

“We’re lawyers, Hugh. We’re on the side of those paying.”

“And if they’re delusional?“

Dave’s got a bit more sense than that. “We have Google in the North, you know.” He wants a “corner shop” sized bank to serve and benefit “Buuuuuurnley.” And he wants to tilt at this particular windmill to make a point.

“I want (the dimissive, insular FRB) to say that the very people who just lost 500 billion quid are the only people entitled to look after our money.”

So what we have here is a fish-out-of-water tale of the stressed C-Class Mercedes lawyer who sees the light thanks to persuasion, first-person observation — the town needs help and Dave’s a stand-up bloke — and warming to the charms of polite, compassionate people and the beautiful, no-nonsense doctor (Phoebe Dynevor) who happens to be Dave’s niece.

It’s a little “Local Hero,” “Coca-Cola Kid” and “Doc Hollywood,” with a heaping helping of “It’s a Wonderful Life” — and karaoke.

Dave’s a regular at the Duck & Drake pub, leading sing-alongs as he covers the greatest hits of Free, Whitesnake and Def Leppard.

Kinnear is the bluff and blowsy salesman heart of this Chris Foggin (“Kids in Love”) comedy. But Fry plays its driving force, the character with the “arc,” traveling from cynically irate (like the viewer, he takes a while to understand the accent) to true believer as he gives Dave his day in magistrate’s court.

Dave and the others have to get him from “Can the Bank of Dave exist” to “SHOULD the Bank of Dave exist.”

Hugh Bonneville lends his get-the-film-made name and classist edge to Sir Charles, a banking world insider out to stop Dave in his tracks.

“Once ordinary start thinking they can get in on the act,” the “Barbarians” will be “at the gate.”

Indeed.

The film has lots of cheesy karaoke and a kind of light artlessness that works almost in spite of itself. Piers Ashworth’s script serves up a lot of just-fun-enough characters — an aged rock promoter (Paul Kaye), a devious ex (Naomi Battrick), “Dave’s first loan” (Cathy Tyson) — to sprinkle the proceedings with supporting player delights.

If the bank is to be a “corner shop” level institution, soo too the movie hasn’t the ambition to be an awards contender or blockbuster. “Dave” manages to be just cute enough to come off, largely thanks to that cast, this setting and its “everybody hates bankers” ethos.

That even carries forth on into FRB meetings, where they freely admit being “entitled, untrustworthy a–holes.”

Yes, that’s true in North America as well. But it sounds better when so-described in that posh accent, you know.

Rating: PG-13, for some profanity, performed in quite the accent.

Cast: Rory Kinnear, Joel Fry, Phoebe Dynevor, Jo Hartley, Cathy Tyson, Paul Kaye, Naomi Battrick, Angus Wright and Hugh Bonneville.

Credits: Directed by Chris Foggin, scripted by Piers Ashworth. A Samuel Goldwyn (Aug 25) release.

Running time: 1:44