Clif Bar Energy Bar

£15 (pack of 12), wiggle.co.uk

Cliff Bar makes a range of excellent, natural-tasting bars. The brand uses organic and whole ingredients, including rolled oats, oat fibre and dates, to deliver a flapjack-like texture. Be warned, though: the bars are quite large, with a 68g White Chocolate Macadamia Nut Bar containing 279kcals, 7.4g fat and 42g carbs. With 9g of protein, too, they’re a good choice for longer endurance sessions, as well as post-workout refuel.