Prepare Chips: Heat oil in a deep fryer or large pot to 160°C (320°F). Fry chips for 5 minutes until soft but not browned. Remove and drain on paper towels.
Make Batter: In a mixing bowl, combine rice flour, cornflour, baking powder, salt, and paprika. Gradually whisk in cold sparkling water until smooth.
Prepare Fish: Pat fillets dry and lightly dust with extra rice flour. This helps the batter stick.
Fry Fish: Increase oil temperature to 180°C (350°F). Dip each fillet into the batter, letting excess drip off. Carefully place in hot oil and fry for 5-7 minutes until golden and crispy.
Finish Chips: Return chips to hot oil and fry for another 3-4 minutes until golden and crispy. Drain on paper towels.
Serve: Plate with tartar sauce, mushy peas, or lemon wedges. Enjoy fresh!