Commentary from Sherlock, The Great Game

Benedict: “There’s so much to play in this scene [but] one of my main preoccupations was the fact that my Spencer Hart suit …”
(Mark growls in irritation.)
Benedict: “… was bulging at the pockets because it had a gun in it! (He laughs.) It was really odd and difficult to walk!”
Mark: “Can you say that again and just say ‘my suit’?”
Benedict: “OK: that very well-fitted beautifully tailored suit has a rather large gun in it and it was rather distracting, to the point that I had to concentrate very hard on not falling into the water.”