That footpath will exit you onto a track where you turn right and walk a small distance. Look for another sign on the left and go up that path. If you get to a toilet on the right, turn back - you have gone to far.
That path will criss two bridges and get to a fork where you need to go left. You'll eventually reach the original path where you turn left and you'll be on your way. This is much more pleasant than the classic approach.
2/N