Very, very interesting mate. Thank you. What's sparked it is that I know someone who is not an assessor, but consultant who walks companies through the process and he is willing to do this for nigh on free.
I was not thinking so much of the property cleaning company doing this as my solar company. No chemicals etc. the resin question is a good one though, but I have a mate who is a big UK supplier, so may be able to get an answer from him on how to dispose to an ISO standard.
The big attraction is the possibility of someone else compiling all the information for me and putting into a near-pass format ready for auditing, all for free. Still, your thoughts, based on experience are very much worth considering too. I've still got homework to do it seems....