Among the 12 bases from where search and rescue operations are launched is RAF Valley on Anglesey, where the Duke of Cambridge is based.
Under the contracts due to be unveiled tomorrow, the total number of bases is expected to be cut from 12 to10 although it is not clear which bases will be closed.
Assurances have already been given that the Duke will be moved to another part of the military rather than being employed by the firm that is awarded the search and rescue contracts.
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"The council's inspector judged there was an imminent health risk and an immediate voluntary closure of the takeaway was agreed."