Justjimmy, I suspect that you are correct. I know that I saw the 246 number in a document connected to my maternal grandfather William Fairbairn, but in a quick look through my files I cannot find it just now. However I did find a map with a “275??” on it so I presume you are right.
In 2008 I spent 4 weeks doing a photo-shoot around Scotland for my one and only return visit. I specifically went to Wishaw to find the old house, but it was gone! A petrol station had been built over it and then partially torn down, such is progress. And now via Google Earth I see that culture has come to Wishaw; a KFC is operating on Glasgow Road. There used to be 3 houses between the KFC and the railway bridge with my grandfather’s house being the one next to the bridge. In 2008 I wrote to a Fairbairn living in Wishaw but never got any response.
My other lasting memory of the place was a very large pot outside the front door. Each morning the contents of the chamber pots were poured into this large pot. My job was every week to scoop up some of the contents and pour it over the vegetable patch in the back garden! Memories that linger!! Still, John Higgins compensates for most of it.