Mayor of London, Boris Johnson, says he's delighted that the football festival will be held in Stratford.
"We are delighted that the UEFA Champions Festival is returning to London and especially that it will take place on the International Quarter close to Queen Elizabeth Olympic Park, the scene of our biggest sporting moment. It will provide a fantastic week-long family event and will revive the spirit of community and celebration that made last year's Olympic Games so special."
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The force says the increased police presence should provide reassurance to the public - without affecting the spirit of the event.
Resident group Justice 4 Grenfell say they were not consulted and will raise concerns about the appointment at the highest level.
They tried to drive off, pursued by the suspect on foot, before their car crashed into a fence.