My mother bought me AWT's book, he's not a low carb fan obviously as there were about two recipes I could do !
My snacks..Lindt Excellence 90% cocoa chocolate (14g carbs the whole 100g bar) which I usually eat two squares at a time slathered in organic unsalted peanut butter. As a low carber I don't worry about fat or calories but after finding out from Tesco that even their pork loin chops have additives (dried glucose syrup, sodium acetate, 11% added water) I've gone all additive and preservative free so wouldn't touch Peperami now.
Prosciutto di Parma (1.99 Lidl, £3 ASDA) is additive free so I like to nibble on that plus I really like nuts and seeds of all kinds. essentialWaitrose houmous is the least carby of any I spotted on ASDA, Sainsbury's, Tesco and Waitrose websites. I'm okay with raw carrot sticks so I subbed these for pitta or grissini.
I used to have a couple of scoops of Kelly's of Cornwall clotted cream ice cream IIRC 11g or 12g carbs and Wall's Classics Cornish vanilla is the same. Great with Rodda's clotted cream, extra thick double cream and whichever berries you're OK with.
ASDA Chosen By You Omega 3 fish fingers 900g are only 3.8g carbs per finger if you like to do a Nigella Lawson style snack with low carb bread/rolls and mayo.