I saw an interview with a scientist on ITN and she admitted that they don't know whether the bowel cancer is caused by the haem in red meat (a blood product I guess) which gives it the red colour, or whether it's the preservatives.
So firstly, it seems to me, that they should have some evidence rather than a vague theory.
Ancel Keys had a theory about cholesterol which was proven to be wrong and look how many people have gotten obese eating the supposedly healthy low fat low cholesterol diet because of wrong advice !
As researchers are fond of saying, 'correlation is not causation'. If you look at 20, 599, even 10,000 people and they all eat red meat and many get cancer, that doesn't prove that they got it from eating red meat. They might be many other things going on eg smoking, alcohol, drugs and genetics.
Humans have been eating animals ever since we've been around. It might be that the nature of the meat has changed however. Much of it is grain or soya fed, much of it is fed on GM feed now.
Additives in food only have to test as non-toxic i.e. they won't kill you immediately. They don't have to be tested long-term or tested in conjunction with other additives.
Morrisons works directly with farms, as does Waitrose for much of its meat. Co-op owns some farms. I don't know about the others.
Aldi, ASDA, Co-op, Lidl, Marks and Spencer. Morrisons, Sainsbury's, Tesco and even Waitrose, all allow some GM feed in some non-organic ranges. Some allow it in anything non-organic. None of the animals raised on GM feed or their products e.g. milk, butter, eggs have to be labelled.
You have to be really careful about reading labels, because some supermarkets do add stuff like water, glucose syrup and chemicals to plain meat.
Things like ham, sausages and bacon usually do contain preservatives, even if organic.
Added together, I buy more veg, dairy, fish and game than I do red meat. It's almost always organic or wild. I'd like to buy local but this area is generally arable rather than meat and dairy.