"[,,,] nice one uk intelligence service"
No, not really. Either you believe that this was ethically appropriate, in which case they wasted a glorious opportunity, or you believe that even scum like AQ deserve to have their say and publish their little newsletters, in which case it was wrong. It really doesn't matter which way you go (personally, for me, I lean towards freedom of the press, but with the understanding that handing out bomb plans and encouraging people to go out and use them be is probably stretching that freedom further than it should go), but you have to choose one or the other. From my perspective, this mission was bungled.