The hillfort sounds like a Prehistory Themepark for the Victorian era. A special railway from Brighton deposited you at the foot of the hill, from where you could get another steep railway up the fort. Up to 30,000 people visited a DAY in its heyday. Attractions also included two bandstands, an observatory, a camera obscura, fairground rides, a switchback railway, and an aerial cableway across the combe.
There’s still a carpark, toilets, a hotel?? and undoubtedly somewhere to buy an icecream.
Despite being extensively messed about, as a large univallate hillfort it’s still ‘of national importance’ according to the NMR.