Check post PhoenixRev post #398 or am I imagining where in his cited quote it contains refernce to London Transport and later to IRA (that organisation!)

I am not going to address how they went about their skullduggery but before you say they are not current, I am afraid that is not true. The hardliners are still around in the 'Continuity' evolution and doing what they always did i.e killing young men in uniform and making very large bangs (and they look like you and me). Poor lads stepped out from their Guardpost to check a 'Pizza delivery' arriving in a vehicle....end of story, very tragic.
Photos befoerhand of layout and positions of roadside furniture and nearest probable intervention...I'm betting so.

Take (in addition) the case of the attack at GLA. Jeepload of nasty stuff driven at doorway. Now it's a complex approach road layout and small entrance doors. Photos beforehand for familiarisation...I'm betting so!

The 'airliner plot' originating here (2007 I think) would have been catastophic but for intervention. They had a plan to smuggle liquids through the security and then ignite on board causing the machines to drop out of the sky. How did they decide on their method and what made them think they would be succesful at beating the system. Did they check out the operation beforehand. Almost certainly. Photos beforehand. No idea (and neither have you!).

You only hear about the 'successful' attempts and near misses. Do you have all the info. I'm betting not. How many conspiracies are there at any one time? What methods do they use? I think it's safe to say photography is a pre-requisite in many known and also unpublicised cases dependant on circumstance. The fact that those apprehended might not have given information or evidence of how they gathered their information (they may not know) and methods might not have been discovered (or was not publicised) should not be taken to mean that it did not happen. That's my view from the sidelines anyway. Personally, I think those charged with protecting the departure have enough to do without having to contend with those individuals turning up to see just how much they can get away with, for whatever reason. That does not say I would excuse their every action and doubtless, I think they may on occasion be over enthusiastic but the rub goes both ways.