Although now in Sandwell, the woods would have originally been in Worcestershire but only just as they are about 1/2 mile down the road from three shires oak which marked the border of Worcestershire, Warwickshire and Staffordshire.
I sometimes ride through there on my way home. It's not too bad for mud as it is quite hilly so drains well. The grassy dip in the middle can be quite a quagmire in places though. Not much flat ground so will suit an xc runner from a fell running background.
Good luck and happy new year to you!