... Plain crisps

Walkers Ready Salted. Per 100g: Cals, 526; sugar, 0.4g; saturated fat, 2.6g; protein, 6.1g; salt, 1.4g They may be high in calories (171 per 32.5g bag), but plain crisps raise blood sugar less rapidly than an airy bag of cheese puffs or mini rice cakes.

a bag provides less than five per cent of your daily saturated fat, the same fibre as an apple and some cell-protective vitamin e from the oil they’re cooked in.

per bag, they’re not too bad for salt, with 7.5 per cent of your daily limit.