Well, not to split hairs or anything, but there's pot noodle and then there's pot noodle.
I know the kind you are talking about Carys, with those little specks of (I think?) dried vegetables (carrots peas and corn as I recall) in them. Years ago they used to have little pieces of dehydrated scrambled eggs in them, too. Maybe some brands still do. I haven't eaten them for quite some time, but I don't remember the last one I ate having the eggs. Anyway, they come in a little styrofoam cup and you are supposed to peel the cover off part way, add boiling water, wait a couple of minutes, then remove the cover entirely and stir. Those are usually sold as "Cup-O-Noodles" here. They are usually about 10-times more expensive than the other kind of pot-noodle.
Then there is the other pot noodle, often called "ramen" here. Those don't have all the dried bits (and as much assorted chemicals) in them. It's just a package, about the size of your hand, of dried squiggly noodles and it comes with a "flavor packet" that is essentially just bouillon granules (Beef, chicken, pork, etc.) with 3 or flakes of dried parsley just to make it interesting, I guess. You actually have to have a "pot" to cook the noodles in (in some boiling water), and then you add as much or little of the flavoring packet in when they're cooked. If you're in a hurry, or are a very poor starving college student, you can eat them "as is." Or you can toss in some veg and chopped up fish or meat. If you make it with more water, it's actually a noodle soup. Or you can pour off most of the water after the noodles are soft, and make it more pot-noodle. And if you're going to do the latter, you'll probably only want to use half the flavor packet or else it will be too strong. Especially too salty. They sell for about 1/10th of what "Cup-O-Noodles" does.
I don't suppose either one of them is all that healthy for you, particularly if you don't add any of your own veg, etc. And they are both pretty high in sodium. But, when you're trying to squeeze every bit out of your food budget, they are filling at very little cost. Particularly the ramen.
There was a television chef in this country about 20 years ago that used to say, "There are somethings we eat at certain points in our lives because we have to. Later, we have to occasionally eat those thing because they became a part of who we are." (I'm paraphrasing there, I don't know if the exact quote was ever published.)
For me, that was pot noodle. When I was running out of money, trying to finish university, there was precious little else I could buy that would fill me up for 10-cents.