The information on this page is selectively taken from the Really Jewish Food Guide, by the London Beth Din. For fuller information about all foods, buy the book!

The following foods are unkosher, and should not be eaten: Typhoo QT Instant White Tea
Kelloggs Raisin Splitz, Ricicles with Marshmallows, Toppas
Nestle Lucky Charms
Cadburys Caramik, Contrast, Curly Wurly, Milk Tray, Roses, Strollers, Turkish Delight
Fry's Turkish Delight
Goodies Chewits, Daredevil Cigarettes
MarsBounty Milk, Bounty Plain, Tracker Chocolate Chip Variety, Tracker Roast Nut
Paynes Chocolate Peanuts, Chocolate Raisins, Fruitetts, Jelly Babies, Mint Cream Poppets, Mintetts
Rowntree Mackintosh Black Magic Assortment, Fruit Pastilles, Minties, Polo Mints, Secret, Smarties, Tooty Frooties, XXX Mints
Swizzels Double Dip, Love Hearts
Terrys All Gold, Carousel, Fruit Pastilles, Harlequin
Thornton All Thorntons confectionary
KP Discos, Flavoured Hula Hoops, Flavoured Mini Chips, Frisps Flavoured, Skips, Space Racers
Monster Munch All varieties
Smiths All flavoured crisps, Salt N Shake flavoured crisps
Birds Angel Delight, Instant Whip
Heinz Sponge Puddings
Batchelors Savoury Rice
Colmans Dijon Mustard, French Mustard, German Mustard
Batchelors Cup-A-Soup, Slim-A-Soup, Snack-A-Soup, Family Soups, Packet Soups

The above products are unkosher due to the laws of Kashrut, because they contain the unkosher additives.