Newquay instead of Culdrose springs to mind
I'd be surprised if this happened...why move the aircraft further from the open ocean and closer to Chivenor? Surely one of the benefits of the new order will be to remove the current crazy situation where the long-range aircraft has to pop into another SAR base for fuel on its way out to sea (ie Chiv passing Culdrose, or Lossie passing Stornoway). Your suggestion is akin to moving Stornoway to Plockton, or Sumburgh to the Orkneys! And I don't imagine that the new SAR aircraft will have too much in common with either the Air Ambulance or the S-61!
More likely IMHO is to move Lossie to Aberdeen...now that is an airfield with pedigree in operating large helicopters, and it also reduces somewhat the distance to Leconfield, given that Boulmer will be no more.
But we'll see...