This page relates to the wheat crunchies range, KP produces a monthly list of products suitable for vegetarians and free for alcohol. Last updated Aug 2020.
The following products can be confirmed halal:
However, it is disliked to eat Artificial flavoured Bacon, thus the Crispy Bacon flavour should be avoided. Seethe post Stance on Artificial Bacon Flavour.
Recipes may change so always check the ingredients on the pack.