A Southport businessman who ran into a Taylor Swift-themed dance club was stabbed in the leg as he tried to disarm the attacker. Jonathan Hayes, 63, was among those who tried to intervene as a knifeman launched a horrific attack on a group of children enjoying a workshop at the beginning of the school holidays. The Merseyside attack left two children dead and 11 others, including nine more children, injured with the stabbing taking place at the sold-out dance, yoga and bracelet-making workshop, which was just minutes from finishing. Hayes’ wife Helen told The Telegraph he regrets not being abl…