UK may not upgrade all F-35Bs to Block 4 standard


The United Kingdom may not upgrade all of its early model Lockheed Martin F-35B Lightning combat aircraft to the latest Block 4 standard later this decade, declaring it will decide numbers based on ‘military capability requirements’.

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.

“The F-35 Block 4 upgrade has been included in the UK F-35 programme budget since its inception. Decisions on the number of aircraft to be upgraded will be made on the basis of military capability requirements.

The costs of the Block 4 upgrade are managed through the F-35 Joint Programme Office and, as one partner in the multinational F-35 programme, the UK is not in a position to share detailed cost information,” the minister said.



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