It was a sunny July day and I felt as though I was standing in a 19th-Century film set. The whistle of the steam train sounded as I waited on the perfectly preserved Victorian platform at Alresford station in Hampshire. The pale yellow and green station palette, barley twist lamp posts and original signage was virtually the same scene as 100 years ago, and colourful blooms amplified the serene setting. The historical hissing sound marked the beginning of my journey back in time to when the county's famed watercress began to spread nationwide.