“(1) The rules enacted by this section shall have effect, in place of the rules of the common law, to determine— (a) whether any duty is owed by a person as occupier of premises to persons other than his visitors in respect of any risk of their suffering injury on the premises by reason of any danger due to the state of the premises or to things done or omitted to be done on them; and (b) if so, what that duty is. … (3) An occupier of premises owes a duty to another (not being his visitor) in respect of any such risk as is referred to in subsection (1) above if— (a) he is aware of the danger or has reasonable grounds to believe that it exists; (b) he knows or has reasonable grounds to believe that the other is in the vicinity of the danger concerned or that he may come into the vicinity of the danger (in either case, whether the other has lawful authority for being in that vicinity or not); and (c) the risk is one against which, in all the circumstances of the case, he may reasonably be expected to offer the other some protection. (4) Where, by virtue of this section, an occupier of premises owes a duty to another in respect of such a risk, the duty is to take such care as is reasonable in all the circumstances of the case to see that he does not suffer injury on the premises by reason of the danger concerned. … (6) No duty is owed by virtue of this section to any person in respect of risks willingly accepted as his by that person (the question whether a risk was so accepted to be decided on the same principles as in other cases in which one person owes a duty of care to another). (6A) At any time when the right conferred bysection 2(1) of the Countryside and Rights of Way Act 2000 is exercisable in relation to land which is access land for the purposes of Part I of that Act, an occupier of the land owes (subject to subsection (6C) below) no duty by virtue of this section to any person in respect of— (a) a risk resulting from the existence of any natural feature of the landscape, or any river, stream, ditch or pond whether or not a natural feature, or (b) a risk of that person suffering injury when passing over, under or through any wall, fence or gate, except by proper use of the gate or of a stile. …”