Ariana Grande Manchester show: All the details of the benefit concert ..Security will be tight at the event, promised Manchester Police Chief Superintendent Stuart Ellison. On Friday, the Greater Manchester Police tweeted that more than 130,000 are expected in the area, for the concert as well as a soccer game. As a result, there will be "a significant number of officers," some of whom will be armed, from the local police force as well as neighboring ones. There will also be added security checks and fans have been encouraged to leave bags at home to expedite the process..".. Good idea. After all, we don't want another religion of peace incident to happen again.