Can you guess where I am

It's Saturday and I don't have to get up and work! Hadn't done this bike trail for ages - its an old disused railway line from Market Harborough to Northampton -  what is particularly cool about the line is it goes through two tunnels which are pitch black so you need to take a high power torch with you - the terrain was rough so I'm glad I was on the mountain bike - did 20 miles in total - this was the first time I saw so many people out on the trail - it was good but tiring fun though