British anti-Islam activist Tommy Robinson said he was detained at Heathrow Airport on Saturday and had his phone seized, after a week when he posted heavily online about racist and anti-immigrant riots in Northern Ireland. Robinson, whose real name is Stephen Yaxley-Lennon, said on social media he was held on Saturday evening for around three hours under the Counter-Terrorism and Border Security Act. “My phone has been seized by the police,” he wrote. “Please help kick off my legal fund...