Look at some evidence?
If you go to http://theingots.org/community/node/3769
You can look at a page summarising BECTA's required outputs for the project and the SF-UK/TLM provision for the *starting* point. Given that this far surpassess the targets set it's difficult to see how the bid then scored badly on value for money and ability to deliver. The bidder already surpassed the targets without any public money. The full bid is available at http://theingots.org/community/node/3768
We don't really know what the others actually submitted but invite them to attach their bids so everything is open and transparent. Strong bids have nothing to fear.
The fact that the guidance for assessment was not made available to all bidders at the time of submission is in my view a serious flaw in the entire process no matter which bid is stronger on paper.