Lets get some clarification here:

Even with the SAS being in London call out times still apply. They have a base and travel to and from it, they do not work out of various locations.

In relation to the shooting of the brazilian, the police have their own firearms teams who were observing a premsies when Jean Charles de Menezes walked out and proceeded to the Tube Station.

Those staff acted fearing another bomb attack.

SAS would not have been able to deploy quick enough to deal with this situation and indeed it is not within their remit to do so when compared to the remit of the Met team on that day. I guarentee you their base within London would be above the thames not below.

The SAS are skilled at specialist operations, and whilst it would not be beneath them, would not normally be called in to deal with such events when the police can handle it and handle it well.

I make no claims of not being located within Northern Ireland and post in the Commerical forum many items about aviation in NI. I refer “Kev35” to my occupation listed in my profile, i have hardly claimed either location or occupation to be true.

I do not wish this to turn into a debate over Jean Charles de Menezes.