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This shot was taken in 1998 to show the movement of
the tunnel due to 'onion' subsidence. Originally
straight, this stretch between (I think) the Piggott
(nee SSB) and Simpson (nee ICB) buildings, was almost
20m below the surface when the shot was taken. Follow
the orginally straight row of lights on the right hand
side to see how much the tunnel has moved. The far dip
corresponds to the location of the sewage pit (or
'onion' as it was more descriptively called). It was a
never ending job for the heat & vent engineer (Cuz,
grand master of the tunnels during my time) to tame
these tunnels and keep the services going. I remember
he once had to cut off part of his own beard after
becoming frozen to one of the ducts after a session of
pipe worship.
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