No one’s slacking off here — proof that you can still reinvent the wheel with a classic story structure, provided you do it right.

With an interesting blend of high-drama and genuine comment on the defining issue of our time, After the Flood is an entertaining, rewarding watch.

It settles into the aftermath of the disaster, introduces us to folk, conjures a real town and real relationships swiftly and convincingly.

The opening sequence, shot on the River Tees in Co Durham, was grimly striking. .... What is slightly less so is the plot. .... But it deserves credit for being a drama that for once doesn't centre on a raped/mutilated/murdered young woman. It is different, and by no means a damp squib.

They’ve tried to make it Happy Valley-lite. The location (actually filmed in Derbyshire, but could easily pass for Calderdale), the small community, even the theme music are similar. But we’re not in the same league. Sarah Lancashire would wipe the floor with this lot.

What remains is a middle-order cop drama which, unlike the remaining denizens of our drowned world, is really neither fish nor fowl.

Some terrifically written (and performed) scenes of Jo’s home life, besieged by her husband’s terrible sister and family, bumped up against extremely clunky exposition elsewhere, most notably when Jo relayed the entire Lift Man case to her climate activist mother.