"Thomas is not reliable. He's actually quite nutty."
It's a strangely written article, the author seems strangely keen to portray himself as having inside info with parts like:
"the MI6 analysts work in a room that is accessed by a swipe card, the codes of which change regularly."
Wow! Who'd have thought it? That is of no relevance to the reader at all, as soon as I read that the credibility of the author was diminished.