Fez909
toilet expert
Ignoring the fact that should the reason for arrest be true, they would have been nicked immediately, rather than at a later date, there is no doubt in my mind (if the account in the OP is true) that the use of force was inappropriate.
A kid backing off into a fence doesn't constitute a threat, or resisting arrest. So why the use of force? The first course of action is surely to try to arrest the suspect calmly, without force. Then, if such a course of action is not appropriate, to use reasonable force to complete the arrest. Grabbing someone by the jaw and throwing them into a fence as a first course of action doesn't seem reasonable to me.
A kid backing off into a fence doesn't constitute a threat, or resisting arrest. So why the use of force? The first course of action is surely to try to arrest the suspect calmly, without force. Then, if such a course of action is not appropriate, to use reasonable force to complete the arrest. Grabbing someone by the jaw and throwing them into a fence as a first course of action doesn't seem reasonable to me.

. They (Plod) were trying to drag two scared wee boys into a van and were being really rather brutal about it. The Plod class traitors didn't fare so well up against grown men of their own size and age.