Does 'accessway' have to be vehicular? - Public forum - Planning Advisory Service (PAS)

Hello all. I am currently investigating a case where the land owner has created an accessway from a trunk road onto his land by removing some trees, removing a section of fence, scarping back existing soil and laying a chalk hardstanding. However, he has also blocked this access with 3 large boulders so that it cannot be used by vehicles. Nowhere in the TCPA does it state that an accessway needs to be accessible to vehicles....any thoughts? Thanks