NHER 31865 (Monument record) - World War Two spigot mortar emplacement

Mortar spigot by underground structure.
On west side of road between 1877 and 1934 courses of Middle Level Main Drain. Mortar spigot sunk in grass. Immediately adjacent to grassed bunker with door at each end (blocked by barbed wire) and five concrete 'mushrooms' protruding from top. Five blocked rectangular openings to north-west (towards drain). Interior over twelve feet from floor to these openings at roof level (but just above exterior ground level). Probability is that this is some sort of defunct water control station, rather than a defensive position, and mortar spigot was positioned to guard it.
E. Rose (NLA), 8 July 1996.

The buried structure with mushrooms is a former diesel store of the 1930s according to [1]. The spigot was intended to guard the bridge, not this.
E. Rose (NLA), 19 August 2003.

Observation:
Assumingly during the landscaping around the new pumping station, the old fuel store was demolished late 2010 - early 2011.
W. Arnold (HES), 04 May 2011