I really don't expect any of the UK team working in the EW/Mission Systems part of the F-35 programme to come on here and spill the beans on exactly what they are doing and how they are doing it.
Neither do I.
But if the location and function of the F-35 Reprogramming Labs are on the public record, surely the same would be true of parallel facilities in other programs. So the question I asked MSOCS - "which other fighter aircraft are exported on condition that the buyers can only edit their threat libraries in facilities based in the vendor's sovereign territory and controlled (inside and out) by the vendor's armed forces?" - should have an unclassified answer.