Entertainment Tweet by @SheffCityHall Published July 23 2020 03:03 PM 📢📢 New on sale announcement 📢📢 @UB40 featuring Ali Campbell and Astro @Ali_Astro_ will be performing @SheffCityHall on Friday 9th April 2021, the opening night of the Unprecedented Tour.Tickets on general sale 10am Fri 31 July - further info visit https://t.co/whYczVh3Pz, — Sheffield City Hall (@SheffCityHall) July 23, 2020 14:03