I was meaning vehicle insurance, if you tell your insurers over the phone that you have a 300ltr baffled tank in the back secured with straps, they may not cover you.
There was a thread a while back saying that insurers were insisting it be safety checked, i.e. a 10k ionics system.
that pole that lasted you 7 years would have costs more than £250 alone let alone anything else.
Also yes we have to deal with petrol but if you are carry 300 ltrs of water, your car will use allot more petrol than a trad window cleaner, also the vehicle will wear more, i.e. tyres etc.
I really don't want to go through all the pro and cons of trad and WFP again, only get across that they both have pros and cons and should go hand in hand.
And as for rules on using a ladder, it should be someone who will be realistic about what people can do within the economic restrains of there business. If we dont concider the economic implications, no one would be able to work. All jobs carry risk. Police men, traffic wardens, bin men, taxi drivers, construction workers, demolition contractors, on and on and on....
If you cant be sensible and realistic and most of all clear, there is no point trying to impose any rule.