By Sam Elliott-Gibbs Olly Alexander says he has been left “sad and distressed” by parts of his Eurovision experience. The contest is at the centre of a political storm with pressure placed on some of the artists to boycott the event. The Israeli National Security Agency saying it has made plans to raise the threat level from two to three amid heightened tensions over the war in Gaza. Widespread protests are expected to cast a shadow over the event. It comes after the Eurovision organisers said they reserve the right to remove any Palestinian flags and pro-Palestinian symbols at the show in Swe…