If the Manston issue is giving Bristow a bit of a problem, why not move the base planned for Manston to Norwich and shift Humberside further north to Newcastle? That way the south of England isn't quite so SAR-base heavy, the 189 goes to a base where Bristow are already introducing it for Oil & Gas and north-east England/south-east Scotland won't feel the loss of Boulmer SAR quite so keenly.
There you are Bristow. I don't charge consultancy fees.