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Motorcycle road-racing has been dominated for decades by one dynasty – Irish brothers Joey and Robert Dunlop, and the latter’s sons William and Michael. Dermot Lavery and Michael Hewitt’s doc does for the sport what Senna did for Formula One, capturing its addictive, lethal thrills via one family’s human drama. It’s a high-speed saga of catastrophes and comebacks building to an astonishing emotional pay-off.

Less adventurous stylistically than other motorsport docs, maybe, but more heartfelt thanks to a spine of bittersweet first-person testimony and the sensory eloquence of the Dunlops in motion.