After wowing Simon Cowell and the show’s judges, Britain’s Got Talent finalist Cillian O’Connor is bringing his debut stage show My Magic World to Newbury next week. “An incredible talent,” said Simon Cowell of the teen magician who secured a place in the nation’s heart, eventually finishing in the top three. Performances online have now been the most watched of the entire series, reaching more than 500 million views in just a few weeks. His show at Arlington Arts, Snelsmore, on Friday (July 19) features special guest Ryland Petty from America’s Got Talent. With appearances in Monte Carlo and …