Dv,
Not sure on that point.
I do have more FOI information, as soon as it becomes available on the MOD disclosure log I will place a link to it. Not a great deal of interest really other than an SFS relating to XV250 on or around 31.10.06:
Post AAR sortie, evidence of fuel leak in area of 6 tank during after flight servicing, on investigation fuel found puddled in the rear hinge fairing. During refuel, fuel was evident in the 6 tank inter-space drains, suspect 6 tank 3 cell leak, further invest required.
Interestingly it goes on to state:
This is the third AC with fuel leak issues post AAR sorties.