Da4orce: Having read the full Air Incident report the impression that I get is that it was not a blow-off. Why?
(1) No.1 tank was well below 15K at the time. In fact it never went above 14.5K (I assume you are thinking of the type of blow-off mentioned in BOI report)
(2) Fuel appeared to be coming from the bomb bay, and the post flight check supports that by the amount fuel in that area.
(3) Initial testing suggests that the problem was associated with fuel line couplings.
(4) There were high pressure surges during re-fuelling (up to 80 psi)
(5) There was no evidence of any fuel in the blow-off valve.
The report implies that it was difficult to replicate fuel fault conditions on the ground, which is something that came across in the QinetiQ report.
There should be a follow up report, so someone should be able to complete the story.
I suppose this could, quite easily been another XV230, had the fuel found a source of ingnition (The SCP was cleared for use)
DV