Peter Mullan (My Name Is Joe) is the reason to see this 2005 drama, another in the burgeoning microgenre of films about Brits coping with layoffs. A tight-lipped Glasgow family man, he’s haunted by his son’s drowning decades ago, so when he loses the shipyard job he’s had for 36 years his decision to reinvent himself by swimming the English Channel is both surprising and symbolic. Humorous touches add warmth without being cloying, but Mullan carries the film with his intelligence and rugged intensity: images of his barrel-chested physique against the craggy shore resound on such an elemental level as to be almost spiritual. Brenda Blethyn, Billy Boyd, Sean McGinley, and Ron Cook give fine support under Gaby Dellal’s direction. PG-13, 99 min.