know im not joking i use a hazad cone for my residential work and all my customer respond well to me taking saftey seriously thats why i was thinking about putting a window cleaner at work stickers on the 25ltr trolley drums then theirs no need for a cone the stickers only cost about £1.80 each better safe than sorry plus if you don't use hazard signs on residential work you could be opening yourself up for a claim from the dole dossers