Andrew, I've been watching your Lochhead enquiries. My knowlege of a Lochhead Family in Paisley is as follows.....,neighbours, way back in the 50s & 60s in Greenock Road , Paisley. James and Elizabeth Lochhead had four sons, Jim b. about 1936, Alastair b. about 1938 , John b. perhaps 1942 and Sandy b. around1947. They had a Taxi business before Elizabeth was widowed. Her last known address was number 19 of that road. Perhaps another shot in the dark...but probably could be found in a Trades Directory for those years. Indeed you could try contacting by email to locstud.els@renfrewshire.gov.uk they might well be able to help you with this....or with the Dan Lochhead guy at the Paisley Express Offices.