Annie Kelly

You have recently done this reporting where you spoke to different people who were very abruptly asked to leave a shop by security guards because they'd been identified by something called Live Facial Recognition or LFR.

You know, none of us are any strangers to CCTV.

We all know we're being filmed when we're in supermarkets.

But can you tell us what is LFR and how is it different?

And tell me how that would play out in that supermarket setting.

We've heard from those three people that experienced this firsthand.

But can you tell us how it is that supermarkets are using this?

Can you tell us which supermarkets and other shops are using this technology?

And millions of people going through those shops.

Every year, I mean, that's millions of faces that are being scanned every time you're going in to buy a pack of butter or whatever.

It's like not necessarily something that you'd expect to see or indeed become unwittingly part of when you're doing your weekly shop in Sainsbury's.

How long has this been going on for?

And they must have a duty to tell shoppers that this is happening when they go in to buy something.

How is it that they are communicating or perhaps not particularly effectively communicating that this technology is being used?

And the reason that the supermarkets have decided to use this, is it just because the technology is now widely available?

I mean, I can imagine that this could alienate a lot of people who might be quite surprised and really not that happy about the fact that their faces are being scanned every time they go into one of these retail outlets.

Why have they decided to go with this?

You talked about shoplifting.

Do we know if it's led to a drop in shoplifting for the companies that are using it?

Do you know what happens to those face scans?