I was working in Cheltenham today and decided to avoid the gaze of all the spies I needed to get underground.

The culvert starts of with a short box section and opens up for a couple of hundred feet before the river is once again culverted, it starts with a strange shaped spraycrete affair but soon becomes a silted up 6 foot high box

Cheltenham takes its name from the small River Chelt, which rises nearby at Dowdeswell and runs through the town on its way to the Severn. The town was awarded a market charter in 1226. Though little remains of its pre-spa history, Cheltenham has been a health and holiday spa town resort since the discovery of mineral springs there in 1716. The visit of George III with the queen and royal princesses in 1788 set a stamp of fashion on the spa.[4] The spa waters continue to be taken recreationally at Pittville Pump Room, built for this purpose and completed in 1830; it is a centrepiece of Pittville, a planned extension of Cheltenham to the north, undertaken by Joseph Pitt, who laid the first stone 4 May 1825. Cheltenham's success as a spa town is reflected in the railway station

End of the first section
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Start of the main culvert