Security wise it is a not great. You can see Symantec Ltd is paid a fair bit so can make some fair assumptions upon AV software used by certain departments. MOD suppliers listed, thats a social engineering opertunity for some right there.

Interesting some of the companies are very dependant upon there goverment contracts and looking at some It looks like they were born out of them. I'm sure somebody more versed in company background checks could provide more insight into the onteresting choices and somebody who currently active in pen testing could provide a better insight into how this data can be leveraged.

Still at least its out there to be discussed, kudos to the goverment for that.