Scotsman Ronnie McDonald is the menswear designer for Tiger of Sweden, the fashion brand started in 1903 by two Swedish tailors, Markus Schwarmann and Hjalmar Nordström, with a focus on suits. (In South Africa, they are represented by Brandgroup International.) In more recent years, they have pushed the idea of the 24/7 suit, something that works for the office and socially at night. They have now partnered with the London Cloth Co, founded by Daniel Harris, to create an exclusive tartan fabric drawing from what is often associated with Scotland. Kilts tend to be made with tartan patterns....