Boris Johnson confirmed the NHS will be writing to £1.5m of the most vulnerable Brits, in a bid to “shield” them from coronavirus.
During the conference on Sunday, Boris said he can guarantee the government is "behind" businesses and the public as it moves to take "special steps" to shield the most vulnerable.
Under the new measures, OAPs, cancer victims, and heart attack survivors will have to go without any socialising for up to 12 weeks.
The group is not defined by age but by those with particular underlying health conditions, who are at risk of getting complications from COVID-19.