IT’S entirely apt that the buccaneers in the latest of the Pirates Of The Caribbean franchise are in search of the fabled Fountain of Youth, given that this, the fourth, is being touted as something of a reboot.

Even if maths was your weakest subject in school you couldn’t fail to be intrigued by this stylish thriller in which four mathematicians are invited by a mysterious stranger, the Fermat of the title, to come to an isolated location the better to work on the world’s great enigma.