Entertainment Tweet by @SheffCityHall Published Dec. 25 2020 02:05 PM Catch 2014 winners @Collabro performing on @BGT Christmas Special TONIGHT from 8pm & you can catch them live & in person here Sheffield City Hall in 2021 for 🎫 & info 👉 https://t.co/qlia2lcMkc, — Sheffield City Hall (@SheffCityHall) December 25, 2020 14:05