Mountain Base - Non-Believer Banner #3

Unfortunately Lara can't light her torch from any of the numerous flames left over from the explosion. So you'll need to return to the bathroom. From the soldier's body, turn to face the control room you just blew up. The next banner (3/5) is on the wall in the far left corner just before the low wall separating the room you're in from the control room.

Go through the control room and out the first door on the right.

Head down the stairs and turn left.

Pass the room where you burned the second banner earlier. Then turn left again into the bathroom.

Go through to the second room and light your torch at the barrel.

Then return upstairs to the room with the dead solder. Again, the banner is on the right wall (when facing the soldier) in the corner nearest the control room. Once you've set it on fire, you can extinguish the torch for now.