Preheat the oven to 200°C.

Combine the Plain flour, Sugar, Sea salt and Rosemary in a mixing bowl.

Add the Water and Olive oil and mix until a rough dough forms.

Knead the dough for 2–3 minutes until smooth.

Roll the dough out to approximately 3 mm thick (about the thickness of a £1 coin).

Line a baking tray with greaseproof paper and lightly dust with Plain flour.

Transfer the dough to the tray and cut into the desired cracker shapes using a knife or pastry cutter.

Lightly brush the surface with Water and sprinkle with a little Sea salt.

Prick each cracker with a fork to prevent excessive rising.

Bake for 12–15 minutes until lightly golden and crisp.

Transfer to a wire rack and allow to cool completely before serving.