Our local big Sainsbury’s supermarket has installed airport-style barriers everywhere and you now have to queue and scan your receipt to get out.
what if you didn’t buy anything?
I’m not an expert on Sainsburys, really. We just used to shop there. Most of it is self-checkout but they do have 3 or 4 tills with checkout workers down at one end. I guess you could walk through there. Also there’s a security guard who I guess could let you out.
I only put up with it once - about 3 weeks ago - and haven’t been there since. We’ve done our family shopping there for 15+ years.