Park somewhere near the large red brick pumping house (you can’t miss it) and walk down the narrow lane which runs alongside it. (Don’t try to drive down the lane – too narrow). When you come around the other side of the building you will see a path which takes you straight into the cliff fort. This is the only prehistoric site I have been to with a football pitch / goals in the middle of it!! Great views of the Severn Bridge.
And as a lad I used to play football on this field and occasionally lost a ball to the river....!
Not much has changed in the past 50 or so years since I've known it apart from the removal of the 'death slide' from the ramparts next to the pillbox and the goalposts being shifted around a bit