© Joel Goodman - 07973 332324 - all rights reserved . 14/02/2020. Manchester, UK. Armed British Transport Police are seen in the Arndale Centre during the exercise . Police stage a major terrorist incident as a training exercise , at the Arndale Shopping Centre in Manchester City Centre . Residents have been advised not to be concerned by the sound of loud bangs that might be heard overnight from within the closed-off venue . Photo credit: Joel Goodman