Hi all, thanks so much for your input! I have been in touch with my local council and all is well. After speaking to the Duty Officer of Environmental Health (who, incidentally have NOT been around to see anyone about us, so yah-boo-sucks to the competition!), it appears I am fine!
I should had carried out a "risk assessment", ensuring any issues that could cause problems have been identified and solutions proposed. IE, I have a mask & gloves on to avoid inhalation, an extraction unit to disperse overspray and the Material Data Safety Sheet from the supplier. All of which I have, or in the case of the extraction unit, am in the process of getting.
Thanks in particular to SASSY HASSY who gave me the courage not to fear the authorities and rightly so. Very happy geeklin here!
thanks again,
tj