Found this shelter while having a wander during christmas hols. It had a few tunnels, but was bricked up one end so no idea how much further it went!
Entrance
Door at bottom of stairs
One of the tunnels
There were about four of these wooden partitions, presumably toilets
Another with the door missing, also note the tide mark left by flooding
Entrance
Door at bottom of stairs
One of the tunnels
There were about four of these wooden partitions, presumably toilets
Another with the door missing, also note the tide mark left by flooding