Heat the fan / gas furnace to 180C/160C 4. Mix flour, cooking powder, cinnamon, wholemeal flour and golden caster sugar in a big bowl.
Mix the eggs, half-skimmed milk and sunflower oil in another bowl. Pour the wet ingredients into the dry, mix well, then stir in the sultanas and apples.
Divide the mix between 12 muffin cases and bake for 25 mins. Cool on a wire rack, then pack in a container for lunch.