"[It has] the same effect that you get from spreading French chalk on a dance floor, the most minute particles of solid matter help to create the slippery surface. If you had swept the floor and swept away as much of the road grime as you can the likelihood is you are going to leave the dust behind, a very fine dust, because the brush is not going to shift those fine particles off the floor ... If you introduce dry lubricant material to a floor of this nature you are going to introduce an element of slippiness which was not there before."
"I therefore find that the dust did cause the claimant to slip. I rely in part on the fact that I have found that there was a slip; that uncontaminated this floor was safe. Something must have caused the claimant to slip, otherwise it is unlikely that he would have slipped. It is clear, on the totality of the evidence, that the only factor was dust on the floor ... "
"So far as is reasonably practicable, every floor in a work place ... shall be kept free from ... any ... substance which may cause a person to slip ..."
"I am satisfied that it would have been reasonably practicable to remove such dust as there was before a physical training exercise by damp mopping, as suggested by Mr Holden and indeed was carried out by Mrs Jones regularly on a Thursday morning."
"Fitness training will be carried out in station appliance rooms, and as a consequence these will need to be kept to a high standard of cleanliness. All floor areas will need to be checked by the Watch Physical Training Instructor and Officer-in-Charge prior to the commencement of the activity. Special attention will need to be given to any water or oil which may be lying on floor surfaces and also any avoidable risks which may be apparent. The use of cones to nominate a safe area should be considered."