Sorry to be nosy, but why do you need so much variety? Does everyone in your house like a different cereal? Would it not be easier to say have what's cheapest (and healthest) and that's it. You must be exhausted looking for the cheapest of each of these on a continuous basis.
My current stock of cereal includes:
Cheerios
Rice Crispies
Lidl Rice Crispies
Lidl Bran Flakes
Lidl Corn Flakes (Lidl do pretty good own brand cereal)
Lidl Weetabix (too messy, don't get them out often)
Tesco Malt Wheats
and some Shredded Wheat for my occasional afternoon snack
I've tried to get the children to eat porridge a few times but to no avail.
Since I lack space, only 2 boxes are allowed open at one time.
Fortunately, 2 of the children actually like the "crunchy bits at the bottom" so we don't have to have that row!
Like AJ, it's own brand only in this house except for half price or BOGOF when the back kitchen gets filled up. Also, some of the own brands are a bit lower in sugar.