Boris Johnson has announced a low-tech test, track and trace system is being launched from tomorrow. It could see healthy Brits forced to self-isolate at home if they have been in contact with a confirmed case.
Call handlers will interview those in England who have tested positive and ask for details of anyone they have recently been near.
Recent contacts who do not have symptoms will be called and asked to self-isolate at home for 14 days. Close contact is defined as being closer than 2metres to someone with symptoms for more than 15 minutes.
Data will be analysed to decide whether workplaces, schools, housing estates or blocks of flats need to be locked down to quell local outbreaks.