I think it might be a Lancaster also. Scroll down to the last picture on this link.
You are looking forward in the plane from just behind the bomb bay. In the center is a "step" to get up and over the bomb bay. I think that might be what we see on the right side of your picture. Also notice the hydraulic? "tubes" on the left wall and how the pipes run in an out of them. I think those are also in your picture.
At the very lower left of the linked picture is the start of the "odd" "T" device that tubes run to from the vertical tubes. You can see the whole device in your picture.
http://www.w4960.nl/lancaster.html