occupier must take such care as in the circumstances of the case is reasonable to see the visitor will be reasonably safe in using the premises
premises doesn't have to be completely safe, just reasonably (laverton v kiapasha)
tripping, slipping and falling are everyday occurrences, accidents happen (dean and rochester cathedral)
duty does not have to extend to liability for pure accidents or last indefinitely where there could be other causes of damage (cole v royal british legion)