By 1934, 200 million packets of crisps were sold in Britain each year, 95 percent of which were manufactured by Smith’s. Smiths was initially slow to join the flavour revolution, but eventually brought out a salt ‘n’ vinegar flavoured crisp, tested first by its Geordie subsidiary Tudor, and launched nationally in 1967. Though they did not know it, the companies had begun a battle that would become a two-decade flavour war. By the end of the 1960s, the crisp market had doubled.
Salt & Vinegar
Museum of Crisps 