Many of Walkers brands were formerly branded under the Smiths Crisps name. This comes from the time when Walkers, Smiths and Tudor Crisps were the three main brands of Nabisco's UK snack division with Tudor being marketed mainly in the north of England and Walkers in the south. After the takeover by Pepsico the Tudor name was dropped and the Smiths brand has gradually been phased out in favour of Walkers.
The only products currently retaining the Smiths brand are Salt 'n' Shake, Salt & Vinegar and Ready Salted Chipsticks, Frazzles and the "Savoury Selection", which includes Bacon Flavour Fries, Scampi Flavour Fries and Cheese Flavoured Moments.