Job done today , soaked affected area with odour neutraliser including backing and underlay,worked it in with frill brush ,left for 15 min swell then rinse extracted, Sprayed the stain with enzyme but carpet too bleached.,did reduce the marks though. Cleaned rest of carpet with f90 and misted the whole area. once more with o n,and left to dry. Smelt better s I was leaving but will know if it's been successful once Customer was happy with result