I also remember lowering a pannier from the bomb bay of a Vulcan at Finningley Christmas '64 that was chocker with fresh salmon. The aircraft having just returned from Goose Bay/Gander. Said pannier being hauled off to the officers mess for distribution.
We always used to bring salmon back from Goose in Annie's hatch at the rear of the Victor. As
oldbaldeagle pointed out theres no duty payable on salmon, which was bought and paid for at the Hudson Bay Trading Post (a bit like LIDL's but not so up market!). Also remember bringing lobsters back from Stornaway in a Hastings for a ball at Lindholme and the buggers escaped and were wandering all around the rear of the a/c!