Place the flour into a large bowl. Add the courgette strips and toss to coat thoroughly.
Place the milk into a separate bowl and dip the courgette into the milk, then place into the flour again and toss to coat.
Heat the oil in a deep, heavy-bottomed pan. The oil is ready when a breadcrumb dropped into it will sizzle gently. (CAUTION: Hot oil can be very dangerous. Do not leave unattended.)
Carefully add the courgette strips and deep-fry until golden. Remove with a slotted spoon and drain on kitchen towels.
Serve in a warm bowl, sprinkled with salt and freshly ground black pepper, to taste.