The heavy seat was thrown from the third floor of the shopping centre (credit: Google Maps)
A viral clip of the incident on social media shows the seat landing on the ground floor below – narrowly missing shoppers passing by.
A 14-year-old boy and a 16-year-old boy have now been arrested following the incident on Saturday, 1 March.
The pair have been arrested on suspicion of criminal damage and remain in custody.
Fortunately, no one was injured.
Inspector Dan Window, from Stratford Neighbourhood Policing Team, said:
“We have arrested two people following Saturday’s incident and they remain in custody.
“This was a serious incident and I would encourage anyone who may have information to contact the police ref: CAD 5623/04Mar
“Alternatively you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or visit crimestoppers-uk.org.”