"But I can tell you that just over 24 hours, 405,000 people have responded to the call".
"When we launched the appeal last night, we hoped to get 250,000 volunteers over a few days".
He also praised the millions of hardworking NHS staff who are now dealing with the pandemic in the UK.More news: Chef Floyd Cardoz dead at 59 from coronavirus complications
NHS England medical director Stephen Powis described it as "an absolutely astonishing response".
Health Secretary Matt Hancock said that the volunteers would be needed to pitch in with "shopping and delivery of medicines" and "to support those who are shielded to protect their own health".
During his daily briefing, the Prime Minister revealed that an extraordinary number of volunteers had come forward to help frontline services in the fight against coronavirus.More news: 3 fresh cases take TN Covid-19 total to 15
Boris Johnson finds himself under pressure to offer more support for self-employed workers, who have received limited support from the government compared to measures in place for those employed by a company.
Who will be able to request helpOther health services including Global Positioning System, doctors, pharmacists, social care staff will be able to request help from the volunteers for their at risk patients through a call centre where the needs of the patient will be matched to a volunteer.More news: MINISTRY / KING CRIMSON Drummer BILL RIEFLIN Passes Following Battle With Cancer
To sign up to the volunteer responders scheme, head to the Good Sam App Website.