Hi 1stClean
Every training course I've attended in recent years has suggested that it is a requirement of the law to carry Safety Data Sheets on the van and also to be kept in the office. I accept that I may have been mis-informed, but if I have, I make no appology for the rest of my statement because, as pointed out by Rabby and others, common sense rules. After all, that is probably the biggest factor in all Health and Safety practices.
Something else I have been told on frequent occasions, and I presume it to be correct, is that if you purchase any cleaning product from anyone, be it Prochem or Tesco, they have a legal obligation, upon request, to provide a safety Data Sheet within 14 days. So if you are still using Stardrops or Persil to clean carpets, you need a data sheet for them too.
As for the hazards being printed on the labels, my understanding is that the labels have a precy of the data sheet. Basically just a brief quideline and information. You would need the complete document to give you all the information required by the Emergency Services to allow them to carry out their duties effectively. However, there are one or two manufacturers who are taking the lead and supplying EVERY product with full data sheet information. Whether this is printed on the label or is in the form of an attached sheet I can't be sure. I'm not aware of this happening in the specialist CC industry.
Finally, there are some commercial clients who will not allow you on the premises without a Method Statement and accompanying Safety Data Sheets for every product you will have on site, including unused products that will be left in your van.
Safe and happy cleaning

Ken