North Denes is close to the customers facilates and harbour it can open and close when it likes.
Norwich has limited opening times in comparision also an aggressive anti aircraft lobby which see it as a blight on their house values ,not an asset to the comunity providing jobs.
It is also 25 miles and 40 minutes away which can be considerably longer in summer (A47 and tourists) Not good if you need to get skilled man or part out to rig .
Whats the cost per hour of lost production?
My personal view is that CHC are banking on the SAR contract and couldn't careless about the southern North Sea.