It is too easy to blame those who reviewed and check the bids for compliance - I know some people who were involved and it was a nightmare of a job checking every fact and figure (often stuff that should have been correctly referenced and presented by the bidder) - you have to draw your subject matter experts from far and wide and those with the best knowledge might not be the most experienced in this analysis discipline.
Whether or not the contract continues (or has even started) to be compliant will only be known by Bristow, HMCG and DfT so I won't expect any revelations here or in the press - we just won't know.