preventing a breach of the common duty (2)
s.2(4)(b) - for an independent contractor to be blamed due to faulty work, occupier must show:
it was reasonable to hire a contractor - (haseline v daw)
reasonable entrustment that the contractor is competent - (Bottomley v Todmorden cricket club)
reasonable checks to inspect the work, if it's simple enough to check - (woodward v mayor of Hastings)