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Ramesh, thank you for your suggestion, I have the 'vinegar' book and do agree it has the answer to a lot of ills.I think I'm( fingers and toes crossed )going to be ok.I bicarbed the boot and left it, then took the carpet out , it was scrubbed and left out to dry in the sun for 4 days. I sprayed the interior with Oust( thinking I was wasting my time) but I knew nothing had been spilled in the inside of the car. Have to say, I was pleasantly surprised to find the pong had lessened. I resprayed it this afternoon and do believe I am lucky and that the car will be habitable without the use of gasmasks!!
Thank you all for your advice- very much appreciated!!!