The ex-Liverpool player was inspired to take on the challenge after meeting Isla Grist, 14, who suffers from the rare skin disease Epidermolysis bullosa.The 70-year-old broke down in tears during a BBC interview as he called it “the cruellest disease out there”.Souness completed the 21-mile swim as part of a six-person relay team in 12 hours and 17 minutes.Posting on Twitter, the...