The illustration provided is of a classic AFTERNOON TEA. A Scottish HIGH TEA would be something like poached eggs, fishcakes, or Welsh Rarebit, followed by scones, pancakes, fancy cakes if you were being a bit "society" and pot after pot of tea.
It would not include sandwiches - the protein would have been provided by the hot something, whatever it was, and the starch by the scones and pancakes.