Actually, big (capital) science projects have way more evidence than normal government projects, if they didn't then the huge numbers of scientists who didn't get positions on the committee would raise hell. What this is about is the men in the ministry getting in on the act. At the moment the science community still believes in the Haldane principle and, since they are funded by non-departmental bodies, expect BIS et al to leave them to it. This is some civil servants trying to claw back control so they can spend the cash the way they would prefer. Their definition of evidence is probably quite "unique".