Update: The UK government terminated its contact tracing app trial, on going since the beginning of May and will now develop a new contact tracing app based on the Google/Apple Bluetooth tech.
More confusion and incoherent messaging in the public health domain:
A Covid-19 tracing software tool has appeared in the settings of both Android phones and iPhones as part of an update of their operating systems.
In the UK there is currently no available contact-tracing app.
The update has caused some confusion, with people querying the new addition to their handsets on social media.
Source: Coronavirus: New Covid-19 tracing tool appears on smartphones – BBC News
Sounds like the UK is starting over. Their original app used a central cloud-database and now they will develop an app based on the Bluetooth, no-cloud storage model.