Aha! There are a few of us that use it.
Up the twisty section past Dovestones.
Follow the road all the way to the long down hill section, just as it starts to climb take the fast off camber left towards Meltham, over the cattle grid. Left at the bottom when you hit Meltham, over the two mini roundabouts cruising along having a smoke break through all the residential areas, hit the NSL
areas again all the way to the creepy old derelict pub where you take a left into Diggle.
Great drive.