Germany has its Covid-19 app, so where's the UK's?

Around the world, major countries are unveiling new contact-tracing apps as they emerge from lockdown. Germany has just launched a decentralised app based on the Apple and Google platform. Switzerland, Ireland and Austria are testing theirs. And Japan is said to be unveiling something similar, with the help of Microsoft, later this week. So the inhabitants of an island just off the south coast of England could be forgiven for asking - has everybody forgotten about us? Six weeks ago, a trial of the NHS contact-tracing app was launched on the Isle of Wight with great fanfare. Islanders were urged to download it, almost as a patriotic duty - with the prospect that successful testing would lead to a national rollout, at least across England, a couple of weeks later.