In the Anglosphere, roast beef is one of the meats often served at Sunday lunch or dinner.
Sliced roast beef is also sold as a cold cut, and used as a sandwich filling.
The dish is so synonymous with England and its cooking methods from the 18th century that a French nickname for the English is "les Rosbifs".
[1] The beef on weck sandwich is a tradition in western New York dating back to the late 1800s.
In the UK the roast beef sandwich is often served hot with fried onions, gravy and horseradish sauce.