Who'd have thought Poundland charge Waitrose prices? Not their customers, I'm sure.
Of course the business model of this kind of shop is to give the imprsssion that they're cheap even when they're not.
It's very selective though. I enjoy shopping at Waitrose because of the convenience of using my phone to scan/pay (of course today most supermarkets do this, and M&S even goes one further where you just scan ,pay on your phone and walk out without going anywhere near the checkouts).
There have always been key items that Waitrose will price match with even the cheapest rivals, but you don't have to look around for long to see where there are the items that are considerably more expensive - and I assume a lot of people shopping there aren't the type to shop there for certain items, then stop off at Lidl or Savers for other stuff on their way home.
You are effectively paying a convenience fee (which can be quite a bit if you did your entire shop there all the time) for usually a smaller store, that's generally quieter and has staff that seem to be more customer service focussed than others (maybe a generalisation nationally, but certainly the case for me).
Waitrose does of course also require the same careful checking of deals as anywhere else, as it's often cheaper to buy individual items than multipacks, and even better to be prepared to switch between brands for key products depending on deals at the time.
Likewise, Poundland and others have good deals and bad deals.
That's particularly annoying as 'One Stop' are a wholly owned subsidiary of Tesco plc, but don't normally advertise themselves as such.
Premier too. One Stop generally looks quite like a Tesco with the way the stores are laid out and the shelf edge tags, whereas Premier does look more like some independent franchise chain.