LO, ORAC,
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.
The issue of Op Sov has always been a concern, hence the completely appropriate spotlight on it, but there are benefits to being a Level 1 partner. The UK has had key, experienced personnel working in the US and UK on both the technical and legal issues around this subject for several years and our joint efforts with the US on other platforms has also been useful.
You may want specifics to satisfy your interests/agendas but I would truly be saddened to see them broadcast on a public forum. Some elements of this aircraft are classified for good reasons, especially following previous lapses which are evident from Chinese aircraft developments.