As the train slowly slipped out of London&rsquos Victoria Station in the early morning rush hour, I raised a cold, sparkling Bellini to my lips. Before long, charming, efficient stewards started serving up a series of delectable food treats, from a fresh fruit cocktail to smoked trout, caviar, and scrambled eggs nestling on a crumpet. It was a relaxing breakfast in harmony with the lingering pace and gentle rumble of the train as it headed towards royal Sandringham House.