About a mile north of the tunnel would have been East Norton Station. The station was next to what is now the A47. Further north would have been an impressive thirteen arch viaduct that has now been sadly demolished.
I actually have a photo of myself riding my bike over the viaduct which prob gives my age away a bit lol, The demolition of the viaduct can be viewed here
The tunnel itself sits approximately a mile south of East Norton village, The tunnel, originally built in 1879 is 444 yards (406 metres) long.
The tunnel itself is pretty featureless, but good old Giles has made it a whole lot more interesting with various bits of junk but this beautiful piece of agriculture!
Thanks For Looking