Last year at the London Wine Fair, we indulged our passion for Tunnocks with big boxes of the foil wrapped delights on the stand. Not just the caramel wafer biscuit but also the tea cake, that's the marshmallow kind, not the fruit bun found south of the border. Both are icons of classic design that have remained practically untouched for 50 years. The wrapper of the tea cake and the caramel wafer are 'dead wrapped' ie. without glue, so they come off cleanly, in one piece. There is then a great deal of pleasure to be had in smoothing that wrapper out, totally flat and wrinkle free. So much nostalgia is held around Tunnocks, it strangely fills a large part of our consciousness. Scots abroad can be found bonding over a Tunnocks as much as Australians bond over Vegemite or Americans over Oreo cookies. The factory near Glasgow, is run by Boyd Tunnock whose grandfather started the business from a small bakery in 1890. At 80, Tunnock is still a hands on boss, not frightened to get his hands dirty and treats all his staff with utmost respect. The company reported sales of £40 million last year. So somewhere all that time ago, somebody did a great design job and that person still remains unnamed.