Mangotsfield is in the process of being built and he has got various photos of its construction on flickr,https://www.flickr.com/photos/65704889@N04/ and there is a group on flickr dedicated to the https://www.flickr.com/groups/1493786@N23/station. With a blatant off topic moment, the one bit of the station we still have found no evidence of (despite looking in archives, excavating the remains and talking to the Mangotsfield railway circle is what the passageway at the back of the booking hall looked like. This ran from the Gloucester to Bath platform and had a canopy over its length. What we do not know is was there a door into the Booking hall from that passageway? - the walls that have been rebuilt by sustrans have a gap which is a door width, but is it coincidence? and were there any windows?
Sorry Andy, back to Bitton (I've not forgotten those other views to find)