When police a/c come round for replacement, the "management" have to decide what their strategy is for the next (say) 10+ yrs. It seems the Met's strategy requires a white van
Winching isn't allowed unless you can demonstrate a SSE capability in the hover during training. That is why the 135 nor the 145 can winch in the police world.
That is why there is no reference to winching in the PAOM II.
Ironically - if the a/c came already fitted with a winch, you can winch: "in anger" to save life, but that would be the first and last time you did it
EUOps 3.005(h) App 1, refers.