We found the stone after a little searching around in the undergrowth.
Park in the social club car park and walk towards Marston Mortain on the opposite side of the road to the houses (with the church in the background). Enter the park through the first stile that you come to, turn right and walk through the long grass for approx 30-40 yards until you are opposite number six Station Lane / Jubilee Cottages (?) - hard to tell where one starts and the ends.
The stone stands approx 20-24 inches in height and is concreted in place, kind of octagonal in shape.