I will say its a strange plan - this removal of the 145s.
Here we have a unit - the ONLY UK unit - that is equipped and training to undertake the rappel and winch role with a specific aircraft type [arguably the only one able to reasonable undertake the role in UK police service] and they are to be cast to the three corners of the UK to people who will certainly not be able to do the training but available for 'instant' recall to the Capital when the anti-terror wheel comes off.
Let us hope that the terrorists that surely will hit London announce their plans well in advance.
Therein may lie the NPAS flaw - the very real worry in Whitehall that London air support is being sacrificed on the West Yorkshire altar.