As a matter of interest, it took MoD just 7 working days to come up with those detailed stats. The question was placed by the MP on 19th April and an answer given in parliament on 1st May. It could indicate that the figures were at hand, at the time the question was placed, in support of a BOI finding that the Nimrod's fuel system is sound and has shown no deterioration over the last decade. But you would have to be of a suspicious mind to think that of MoD.
DV