First visited this places in the 90s, not many pics worth scanning from then, re-visited for a look at the 4000 ton C2 type tanks, (6 in total).
Shaft for vent fan and winch access.
Tank internals, the suction pipe can be raised to take the cleanest fuel from near the surface.
Swivel elbow for suction pipe.
The tanks are 118 feet in diameter and nearly 20 feet high.
Where it fits on the WW2 system.