many kinds of food types were invented for this purpose. the cornish pasty from the uk is one which survives to the present day. other kinds have vanished, and their names forgotten. the bedfordshire clanger was a baked suet dumpling, and there was also a bedfordshire roll. this was savoury at one end and sweet at the other. it was eaten from the savoury end to the sweet end. there used to be many other varieties and version. many have commented on the way convenience foods are heavy on calories. they were meant to be, for work then was usually manual labour, and men used their muscles continually as they worked.