After the trail up the eastern seaboard and RV south of Newfoundland, presumably it took 2 Voyagers and such a southerly pond hop because the F-35B has such a small fuel capacity that a single hose plan across the pond with a single Voyager would have been impossible?
12-15 refuelling brackets for each F-35B from MCAS Beaufort to Marham, according to press reports...