The tunnels continued on and on - as far as the eye could see in the murk.
We passed several iron-rung ladders and closed covers, providing lots of access points.
A spur took off in a northerly direction. I assumed that this followed the corridor to the north.
We continued following the westward tunnel. (By now we had cleared the kitchens and were probably
in the vicinity of the north end of Andrewes/Alleyn).