As Archimedes says:
Likewise, the Neptune - yes, it's a Dutch aircraft and the wrong version, but if repainted (see the Britannia at Cosford, which was a civilian airframe) it could serve as some recognition of Coastal Command during the Cold War - what with Cosford being the Cold War Museum and all that... The fact that the kipper fleet isn't recognised at all bar references to the RAF using the Catalina and the Neptune is a major oversight; that's not in any way to overlook the R1, but 51 wasn't known for its ASW/ASuW work..
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You could then ask what happened to the 6 (yes- Six) Shackleton MR 2s delivered there in the early 70's, including one 'polished up' for display purposes. Last seen on the large dispersal at the Western end of the airfield.