ExGrunt,
I'm afraid that you will probably get the same standard letter on MOD notepaper that I received recently after my MP wrote to John Reid (see my post of 20th November).
MOD will only consider "new" evidence. Tell your MP that the best "new" evidence is that they (MOD) were suing Boeing over the FADEC software issues at the time whilst they claimed that there was no problem with it, btw.
This is all about liability. They will do everything not to change their viewpoint.
Best of luck.