Debris from A's chimney falls on to B's property causing minor damage to the roof of an out building. A pays to have the damage repaired and arranges quotes to have the chimney fixed to prevent future damage. A contractor is found and A seeks permission from B to erect scaffolding (on B's land) to safeguard the contractors while work is complete. B says its not convenient (it may not be). The contractor wont work with a ladder as its unsafe. The contractor is stood down until agreement can be reached.
What is A's future liability for damages caused by further debris? Has B obstructed the repair and in doing so accepted some risk?
My suggestions are not legal advice