Call for urgent reforms to Test and Trace app to help Derbyshire businesses Businesses say it is posing a 'serious threat' Thousands of people in Derby and Derbyshire have been told to isolate by the NHS Covid-19 app. (Image: Derby Telegraph) Guarantee you'll never miss another big story by signing up for our free email updatesInvalid EmailSomething went wrong, please try again later. Subscribe We use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time.More info