They are trialling it
https://www.retailgazette.co.uk/blog...peedier-sales/
But I'm not sure what advantage it would bring for most of their stores. My local Aldi would have to take out at least one till to put self-serve ones in, and I can't see it speeding anything up much. Especially considering my local one still seems very popular with full trolley shoppers.
I can only really see it being useful for them where they either have their bigger stores and have space for them or allowing them smaller locations where putting in enough of their usual tills wouldn't be possible.
Personally I always prefer using the scan and pay services when they are available. Although it's not as 'handsfree' as the Amazon version, since the mobile app versions came along it's good enough for how I shop.