A Dutch sausage roll (saucijzenbroodje) showing the puff pastry surrounding the roll of minced meat inside
The basic composition of a sausage roll is generally a sheet or sheets of puff pastry formed into tubes around sausage meat and glazed with egg or milk before being baked. They can be served either hot or cold. Historically, during the 19th century they were made using shortcrust pastry instead of puff pastry.
The Blackadder series makes mention of sausage rolls. In the first series, episode Born to be King, the Queen is loathing the return of her husband because she feels as she's "being used all night long, like the outside of a sausage roll." In the second series, episode Potato, her excitement at the return of Sir Walter Raleigh lends the Queen an excuse to describe some of her "pretty wild dreams," one of which is her being a sausage roll.