If it had been done properly in the first place, 14 people live and MRA4 would be in service.
As you are not a Time Lord and have no idea how changing the past would alter the future, and also as the Board only gave probable cause for the loss of XV230, in the interests of accuracy could you possibly rewrite the above thus...
If the Nimrod had been better designed, better built or better modified, the crash of XV230 and loss of 14 lives might not have happened.
The link between HC and the MRA4 demise is pure speculation.