Sure, your version is more believable, I mean, aren't Chinese Embassy guard "Keystone Cop"?
First of all, you can't "Remove" people banner on the outside, Chinese Consulate staff does not have jurisdiction on the road of UK, that alone is an assault on common properties.
Second of all, you have the gate open,
@Nan Yang would have you believe the Chinese Consulate Guard is trying to get staff back in from taking those banner during that protest, sure, any dumbass would have stay put, but there Chinese Keystone cop have a bright idea on why don't you open the gate and let our people come in, oh, if these protester are armed with knife or petrol bomb, then everyone go to hell, sorry not sorry.
You either are saying the Chinese Consulate is that INCOMPETENT, or they broke the rule of law and take matter into their own hand, either way that's bad, it's just I don't know which is worse.