Lightopia is preparing to welcome visitors later this week, filling Heaton Park with colourful lanterns and light installations.The festival, which has delayed its opening due to the national lockdown, will officially kick off on Thursday December 3.Many people who held tickets for earlier dates have had their bookings pushed into the new year, with the festival running through now until January 10.It's one of the few festive events that will be able to go ahead, thanks to being outdoors.But the