muchluv wrote:It's not really. Might the kind of thing they do.
You clearly have no understanding of how food manufacturing works. If they mixed two batches on purpose, it wouldn't be two batches, it would be one batch. So that isn't possible and they probably haven't replied to your question because they either don't understand it, or think you're being weird.
When mass-produced food is made in factories, they make a batch of one product (e.g. milk choc chip cookies) and label the packs with that batch number, in case of any recall. Then they put a batch of another product through (e.g. dark choc chip cookies) and give that its own batch number. factories generally work 24 hours with night shift and day shift workers, to cut costs.
So ... if you happen to buy a pack of cookies that was one of the first off the production line, there will be traces of milk chocolate in it from the previous batch. If you buy one of the last packs, the amount of milk contamination will be negligible.
Only allergy-aware companies like Kinnerton clean the machinery thoroughly between batches to remove all possible traces of allergens. The cost of not producing anything for a while (i.e. having machinery stand idle) is reflected in the price of their products. A company like Foxs needs mass-market appeal, so they will only clean their factory thoroughly if it is going to shut down for a while, e.g. a bank holiday.
Hope this clarifies things.
Please don't discourage food manufacturers from catering for vegans!