Gisburn Tunnel.

Came across this great railway tunnel entrance today. I was very surprised that it was double track and evidently well used. From the south it comes through Clitheroe witch does have a large cement works and heads towards Hellifield and then onto the Settle Carlisle line. Think I need to do some research on this and try and get a steam loco coming through.
Sorry about the dirty lens, think it was just condensation. Not sure what could have caused that.