Twenty years on from bursting on to the scene on The X Factor, G4 have released an anniversary album and are heading out on tour. They will bring their Anniversary tour to Newark’s Palace Theatre on Saturday (April 20). Pioneering their pop-opera signature sound, G4 were undisputedly the real winners of the first series of the ground-breaking British talent show. Since then, they have gone from strength-to-strength with highlights including the release of their self-titled double-Platinum number one debut album – the fastest selling album of 2005, countless sold-out shows including The Royal A…