Sky News has found that some users of the NHS COVID-19 app were sent a 'test' message telling them to self-isolate.
They were not told it was a test message and many of them did what the notification told them.
SUBSCRIBE to our YouTube channel for more videos: www.youtube.com/skynews
Follow us on Twitter: twitter.com/skynews
Like us on Facebook: www.facebook.com/skynews
Follow us on Instagram: www.instagram.com/skynews
For more content go to news.sky.com and download our apps:
Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí www.youtube.com/channel/UCzG5BnqHO8oNlrPDW9CYJog