Preheat oven to 180°C fan / 400°F / Gas 6.Line a 20cm (8inch) square baking pan with baking/parchment paper. In a medium sized bowl, beat together the eggs and sugar until pale and fluffy. Approx.: 2-3 minutes.
Whisk in the lemon juice, zest, oil and milk.
In a separate bowl, sift together all the dry ingredients - baking powder, bicarbonate of soda, salt and flour.
Add the dry ingredients to the wet ingredients, stirring until just combined.
Finally, add the raspberries to the batter and fold in with a spatula or wooden spoon carefully.
Baking: Transfer to the prepared baking pan and place in the oven. Turn the oven down to 170°C fan / 375°F / Gas 5 and bake for about 25-30 minutes or until a skewer or toothpick inserted in the centre comes out clean with just a few crumbs on it (not raw batter).
Leave to cool in the pan for 5 minutes then turn out onto a wire rack to cool completely.
Before serving, sprinkle with icing sugar, top with whipping cream or fresh raspberries, to your preference. Store leftovers in the fridge up to 1 day.