Okay, so there wasn't just an allegation, there was evidence that he had. Back when they were first looking at General Vance for the position of CDS, there was a mere rumour that there was something in his past and they consulted the national security adviser because he holds such high clearance, but there was no such step taken at all that we can find by this Prime Minister's staff.
Did you just not consider that this type of information getting in the hands of other people might put the general in a predicament and make him subject to potential blackmail?