Here are the ingredients listed in a pack of Tesco Supermarket "Healthy Eating" -Bacon, Lettuce and Tomato sandwiches.

"Brown Bread with Oatmeal (44%)
(wheat flour; water; wheat bran; rolled oats; wheat protein; yeast; salt; sugar; treacle; oat fibre; malt flour; vinegar; oatmeal; vegetable fibre; fruit juice concentrate; modified maize starch (non GM).
Emulsifiers: mono- & di-acetyltartaric esters of mono- & di-glycerides of fatty acids; flavouring: flour treatment agent; ascorbic acid);
Sweetcure Bacon (15%)
(pork; honey glucose syrup; stabilisers;
sodium triphosphates; calcium dihydrogen
diphosphates; sodium polyphosphates;
Antioxidant: sodium ascorbate; sodium nitrite).
Tomato (14%). Iceberg Lettuce (11%).
Low fat dressing (10%) (water;dried skimmed milk; modified maize starch; spirit vinegar; sugar;white wine vinegar; salt; dextrose; white pepper; dried egg white; Acidity regulator: sodium acetate; mustard flour; sodium chloride; Preservatives: lactic acid, sorbic acid; Colour: titanium dioxide;
Stabilisers: sodium bicarbonate, xanthan gum, sodium alginate; garlic powder).
Low-fat spread (water;vegetable oil; hydrogenated vegetable oil; salt; milk proteins; Stabiliser: sodium alginate; Emulsifiers: mono & di-glycerides of fatty acids, polyglycerol polyricinoleate; Flavouring
vitamin A, vitamin D; Colour: beta-carotene)."

The above was taken from 'New Scientist' "Feedback"
June2002 Vol:174 No2347