The vaccines minister has told Sky News he is "confident" the UK will hit its "tough target" of offering everybody over 50 a coronavirus jab by May.
Speaking to Sophy Ridge on Sunday, Nadhim Zahawi said that at one point on Saturday, the UK was administering COVID-19 jabs at a rate of almost 1,000 per minute.
"The limiting factor is vaccine supply so the vaccine supply remains finite," he said.
"I can tell you that yesterday between 11 and 12 o'clock we almost got to 1,000 jabs a minute, we got to 979 jabs a minute."
Latest figures show more than 11.4 million people in the UK have received the first dose of a coronavirus vaccine.
The pace of the vaccine rollout indicates the UK is on track to meet its target of offering a jab to everyone in the top four priority groups - around 15 million people - by the middle of this month.
It was revealed this week that the government wants to offer a vaccine to those aged over 50 and those aged 16 to 65 who have certain health conditions by the end of April.
Asked about these targets, Mr Zahawi said: "I'm confident we'll meet our mid-February target of the top four cohorts, I'm also confident, because I have enough line of sight of deliveries that are coming through, that we will also meet the one to nine cohorts by May.
"It's a tough target by the way, many many people who are clinically extremely vulnerable have to be reached by GPs, some can't travel."
The vaccines minister added that the UK was beginning to store second doses of the vaccine, in preparation to provide both first and second inoculations next month.