UK IS testing app based upon the Google & Apple system...
"A couple of dozen US states have signed up for the new tool but other jurisdictions – among them the UK, India, Singapore and Australia – are persisting with their own approaches on the basis that the Apple/Google tech makes it harder for their manual contact-tracers to access information."
This isn't true- the UK Gov are testing an app based upon the Google and Apple tools. Its called NHS Covid-19 and is available to folks in the IOW, LB of Newham and also NHS Responders for early testing..