Thanks for all the info.
Managed to get there in the end after parking in the wrong place twice and getting lost in the woods once.
I ended up driving through the Chase as 2 old fellers from the clay badger shooting club said it was OK. I realised on the way back that you're not meant to do that
If anyone else is as confused as I was then the white Wortley shooting club sign is a useful marker showing where to turn off Woodhead Road