The number of Covid vaccine doses will amount to “tens of millions by the end of March” Boris Johnson says.

The supply will "ramp up in the weeks ahead", the PM says during a visit to Chase Farm Hospital in north London where people have been receiving the Oxford-AstraZeneca Vaccine.

Johnson says it is “completely untrue” the NHS doesn’t have immediate capacity to administer two million doses a week, but that the issue is “getting them (the batches of vaccines) properly tested”, and “each batch needs to be properly approved and quality controlled”.

Asked when the government would hit giving two million doses a week, he says he will release more details in the next few days, “as soon as we have better numbers to give”.

Johnson met chemotherapy nurse Christiana Omodara who said she has been worried about passing Covid to her cancer patients.

She said: "Having the vaccine reassured me that at least I was safe and I won't transfer anything to them."

The Prime Minister also watched junior sister Susan Cole get her jab, an experience she described as a "really surreal surprise".

"He asked how I felt about having the vaccine and we talked a little bit about how important it was not just for the person but to protect other people," she said.