Superb beauty spot, much of it accessible
This review is especially helpful for those who have or use the following: Wheelchair, Mobility Scooter
There's a car park with Blue Badge spaces (chargeable unless you're a NT member), cafe and small shop with accessible loo. There's a choice of self guided walks (free guide/map from the cafe). The "sailors walk" has a surfaced path, easy for wheelchairs and scooters. There are lovely views across the punchbowl. If you have more robust wheels, there are lots of paths going off in lots of directions (take the map and just watch out on some of the uneven paths, which can be tricky). The view from Gibbet Hill is great - lots of info boards give the history of the gruesome events that took place here and gave the hill it's name.
Transport & Parking
It's a bit remote - ironically the re routing of the A3 has brought new life to this beauty spot - you really need a car. Not sure where nearest bus passes. Car park has disabled spaces.
Level access into cafe/shop but there are doors. There's a tarmac path from the car park (opp side to the cafe) onto the wheelchair accessible route. The map available in the cafe entrance (free) clearly shows the self guided routes. Although it's not described as wheelchair friendly, the route described as gentle is accessible. There are plenty of other paths but you need robust wheels capable of off-road work to attempt them - if you can, they're great and there are fantastic views to be had.
It's a good loo (accessed from inside the cafe or from the rear of the building). Recently upgraded, it's radar key operated.
I didn't need help as I was accompanied but they all seemed very pleasant.