While I agree that the, "tampons are a luxury" thing is total BS, the rest of this seems an awful lot like false equivocation and/or is misleading.
The first article lists a series of products, some aimed at men, some at women, some costing more for men, some costing more for women and concludes by arguing that it's not fair because women MUST buy what's available to them. Now I'm not from the UK, so please correct me if there's some law I"m not aware of, but are women forced to buy these marked up items? Are they simply not allowed to skip the pink Bic pens and buy the black ones? The only way I can see one arguing that women "must" buy a product is if that product in some way differs significantly from the men's version of the product and that difference is done for serious reasons, in which case the product likely costs more because of these significant differences.
My razors cost a hell of a lot less than my wife's but that's because mine are single safety blades set in a straight razor. She could not possibly shave her legs with these effectively. So, she uses a huge four-bladed monstrosity of a razor with shaving cream built into the razor. Claiming that the huge price discrepancy between these products is sexist is pointless because the two products are in no way similar. If they were very similar and her blades cost more, then she would have the option of buying the "male" version for the cheaper cost. No one is forcing anyone to buy female branded/marketed products.
The second linked article is even worse, since at least the first, in all its vagaries, had the good sense to admit that there are many male marketed products that cost more than the female equivalent. Reading the second article, you'd think that the shopping centers made identical products for men and women, charged women 33% more and then forced women to buy these versions. Oh, but wait, women COULD buy the cheaper men's shaving cream, but then she'd smell like, and I quote, "a cheap man." No no, the solution is that these companies should make a third option, tailored to the author's wishes, that is unisex. Of course the author mentions several brands that do have lines like these, which makes me wonder why the author doesn't simply buy those if that's what she wants! The level of self entitlement throughout is hilarious.
The third article appears to just give a snapshot synopsis of the same material as the other two, except it also contains what appears to be factual errors. If you've read the first two the third is pointless. Well, they kind of all are, though the first does the best job of at least trying to inject some modicum of sense.
In short, it's all much ado about nothing. Despite what the first and second article claim, women consumers have a huge amount of control over this. No one in the UK is being forced to buy a more expensive product just because it's pink but are free to do so if they wish. I also need to do all my clothes shopping in the UK it seems, since here in the States I pay way more for jeans than my wife.
The funny thing to me is that I did see one example of a sexist pricing practice in one of the articles. It is mentioned that men being forced to pay higher insurance rates for the same insurance products as women is sexist. That's actually true because in the case of auto insurance, men don't have a choice. You are legally required to buy it. This is the only case of "must buy" coupled with gendered price gouging that any of the articles brought up, and quickly swept it under the rug of course. Glad the UK ruled that it was sexist, because it is. Find me an equivalent case for women and I'll yell sexism from the rooftops, but pink Bic pens aren't that.