BW is right. No changes I've noted. Nor wish.
My regular shop takes contact details but not all shops do that. I think it's important to contact trace accurately and quickly so outbreaks are shut down.
Else the disease spreads further.
If there is an outbreak, restrictions can come back and these shops would be the first to close.
I have the Covid-19 App as well.
No issue with sharing that info as well.