Kilgour is a longtime Savile Row tailor that happens to offer an alternative product to the traditional bespoke model (cut, sewn and finished in the UK). Actually they offer two alternatives - ready to wear and "entry-level bespoke". An interesting tidbit surfaced recently on the latter.
It appears that the overseas half of Kilgour's entry-level bespoke (cut in England, sewn in Shanghai) is a tailoring establishment called Y. William Yu with shops in Shanghai, Hong Kong and New York.
According to this AskAndy thread, Y. William Yu is among the best in the region, which explains why Kilgour decided to partner or set up a joint venture with their lower cost partner in the Far East.