99% of the time, the officers will only use such methods to restrain a violent suspect or to defend themselves/protect the public.
Of course there will always be a small minority of officers who abuse their powers, but on the whole they abide by the rules.
If someone is resisting arrest, the police should imho have the powers to use methods such as CS Gas etc against them. It is my opinion that you should only have a reason to resist arrest if you have something to hide.
The sooner the government give powers back to the police and stop arsing about with all this human rights shit and paperwork, the better imho.
Them two girls caught on cctv
the other day for instance, should have been targetted by an ARU and forced to drop the weapons. They should then have been prosecuted to the full extent of the law.
But instead, the security guard and police didnt take it very seriously, and they will, if ever caught, most likely get a slap on the wrists.