All this could make the block 4 upgrade numbers more critical.
Answering a question in the House of Commons Minister of State at the Ministry of Defence (MoD), Jeremy Quin, said that, while the international Block 4 (full combat) upgrade has been costed into the UK’s procurement programme, the precise numbers of already-delivered jets to go through the retrofit process have not yet been decided.
JANES 24 JUNE 2020
UK may not upgrade all F-35Bs to Block 4 standard
I wonder if the level/tier 2 & 3 partners will demand work share is revisited if the 138 commitment is explicitly abandoned?