Before moving the machine it is essential that the operator looks behind by turning around to physically see and by using the mirrors to cover the machine's blind spot. Do not rely on the mirrors alone.Disclaimer. The legislative information contained on this web site is my interpretation of the law based on many years in the health and safety business. A definitive interpretation can only be given by the courts. I will therefore not be held responsible for any accident/incident/prosecution arising as a consequence of anyone using any information obtained from this web site.