I think Zodiacs were made by Smiths and were a potato/corn snack which came in cheese and onion and salt and vinegar flavours. On the back of each pack was a sign of the zodiac and a horoscope for that sign.
My friend and I used to by Zodiacs from Woolworths on a Saturday, along with cans of Top Deck Lemonade Shandy and Limeade and Lager. We would take these back to his house where we would consume the above food and drink whilst listening to second-half football commentary on Radio 2 medium wave. No Radio 5 Live then, No Premier League and still 2 points for a win. Oh Happy Days!!!