The only thing not mentioned is actually making the arrest, for which a small core of warranted officers will be needed. But who will they get to do it, when pay and pensions are being slashed and whole units disbanded.
The point to remember is that all of the above will need to be done for PROFIT. the unprofitable stuff will just be ignored.
So when Cameron and May say they are not intent on privatising the Police, THEY ARE LYING.
I wonder if the FAA need any more 40+ years old Lts. My uniform still fits!!