“in the present case there is the potent additional consideration that any difficulty of proof for the claimant has been caused by the defendant’s breach of duty in failing to take any measurements. The judge does not appear to have given any weight to this important factor.” (paragraph 18). He continued (paragraph 19): “If it is a defendant’s duty to measure noise levels in places where his employees work and he does not do so, it hardly lies in his mouth to assert that the noise levels were not in fact excessive. In such circumstances the court should judge a claimant’s evidence benevolently and the defendant’s evidence critically. … [A] defendant who has, in breach of duty, made it difficult or impossible for a claimant to adduce relevant evidence must run the risk of adverse factual findings. To my mind this is just such a case.”