Doodledog
Missiseff
Harris27
Couldn’t believe the prices. I too just buy a few treats from there but can’t believe the prices this year! I’m so glad Aldi do a similiar brochure I’ll just have to pretend I got them mixed up!😂😂
Aldi uses the same supplier, you get the same food for a fraction of the price.
You really don't. 
Suppliers are not processors. Food from Aldi and M&S may be processed in the same factory (or they may not - I don't know), but as I said upthread, they will be on different production lines and made to different recipes.
Aldi food can be very good - I'm not saying otherwise - in fact some lines may be better than M&S, but it is not the same.
I can confirm you're 100% correct from insider knowledge. My 'informant' is connected to one of the other big supermarkets not M&S but confirms M&S have their own recipes etc that are not the same as Aldi, Tesco, Sainsbury's etc. That person also informs that when a company investigates having an Indian based call centre they are invariably shown the M&S one because it's superior and staffed by excellent English speakers. The others not so much.
I have no personal connection to M&S, but yes I do buy some food from there, also Sainsbury's and certain items from Aldi and Lidl, some of which I prefer to M&S's offerings.