Beat in the eggs, then add the milk and orange juice and zest.
Butter the sides of four small bowls or four large ramekin dishes. Put a tablespoon of syrup in each bowl and pour on the batter. Fasten silver foil loosely across the tops to act as lids, and tie on with string.
Place the bowls or ramekins in a roasting tray half-filled with boiling water. Either steam on top of the stove for 40 minutes, or start off on top, and then transfer when bubbling to an oven preheated to 300°F (150°C) Gas 2, and cook for the 40 minutes, until done.
Turn out of the bowls or dishes, and serve with clotted cream.