Well guys this is news to me, my understanding was that only business premises were duty bound to provide a safe working environment, whist private individuals have no such requirements.
I have never heard of a tradesman making a claim against a private householder.
This guy took a chance, went onto a roof and fell off. How was the householder liable?
You can only claim if the accident was not your own fault, in this case it was very much the window cleaners own fault