If anyone was ever in any doubt that we should no longer be sharing intelligence with the Americans, this should end it once and for all.
Interesting to see how they've started to explain it away. Inevitably, they start by denigrating the journalist who was inadvertently admitted to the group. Totally irrelevant of course. Then they say that no classified material was leaked. I hate to think what is the scope of their 'unclassified' material then, because this sounded some pretty meaty stuff.