Just before reaching the station the line passed through Glenfield Tunnel , which was built by Robert Stephenson .
Was , at 1 mile 36 yards , the world 's longest Glenfield Tunnel   at the time .
Just before reaching the station the line passed through Glenfield Tunnel , which was built by Robert Stephenson and was , at 1 mile 36 yards , the world 's longest railway tunnel at the time .