I asked where the following pictures taken and there was a bonus point if you could also guess what the person in the second picture was doing:
Anthony "Underground Masker" Smith was the only person who gave the correct answer to both parts: "The first picture is at Leicester Square. The sign is in the window of the control room opposite the Piccadilly line ticket barriers (between exits 1 and 3).
The second picture is of the end of the hallway between the Bakerloo platforms at Paddington. The man is operating a Greathead tunnelling shield. He appears to be moving one of the panels that expose the rock face. Either that, or he is actually using a pickaxe or something to do the tunnelling - but if he's doing that, then they haven't drawn it very well. It doesn't look like he would achieve much leverage in that posture!"