UK to not get JCA source code after all?

Despite apparently signing a memorandum of understanding that the UK, as the only Tier 1 partner, would get access to the source code of the F-35 JCA it now appears that no one will be getting access. Instead a reprogramming facility will be set up in Florida to develop and monitor upgrades. Maybe the US is afraid the British will lose the code on a bus? Well it seems they have a few problems hanging onto the JCA's secrets itself.