I have chatted again with DS about the problem; he has tried the anxiety medicine, with no success; he doesn't think his cat is spraying, as he is urinating in places (walk-in wardrobe) where no other cat has been. He keeps weeing on a leather chair in the lounge, my son has unzipped the cushion cover and washed it(!) but the cat still returned to it (I told him maybe he needs to put the cat litter tray on the chair
). The cat has urinated in all sorts of places - shoes, sports bags, pillows, it's getting ridiculous. As the cat is only weeing at night, he thinks (maybe as a last resort) he might lock the cat in the kitchen (where the cat flap is) each night. Not ideal, but with two young children in the house, he (and his wife) can well do without all the extra cleaning; they are at the end of their tether!