I've had the portal of this tunnel marked on google maps forever but somehow never bothered to actually go and have a look until now. In spite of an attempt to enter discretely my poorly timed approach led to me attracting the unwanted attention of a few locals, who soon lost interest when they realised I wasn't going to do anything more interesting than put my wellies on and take some photos. This place was last covered on here by @paulpowers who also noted that the entrance is on a road that is actually busier than it really should be.
History (from http://www.forgottenrelics.co.uk/tunnels/gallery/chesterfield.html)
Starting at the far end, the tunnel leads to a concrete chamber with a ladder leading up to a large air vent above. This concrete vent can be seen from the road outside. I did take a photo but it was shit so you'll just have to imagine a photo of a boring concrete vent next to a busy road.
Further in it's a pretty standard abandoned train tunnel. It was a bit misty so my photos aren't as clear as I would have liked, but there’s some nice colours.
Exit was similarly clumsy but better timed, and I headed back towards home slightly more orange than when I left. A quick one, but can't beat a bit of quiet time underground.
