The Medicines and Healthcare Regulatory Agency (MHRA) said it had identified 30 cases of rare blood clot events associated with the AstraZeneca vaccine – out of 18.1 million doses administered up to and including March 24.

The agency said there were no reports for the Pfizer/BioNTech vaccine, but stressed the risk associated with this type of blood clot is “very small” and the benefits of the vaccines against Covid-19 “continue to outweigh any risks”.

Professor Adam Finn, from the University of Bristol and member of the Joint Committee on Vaccination and Immunisation (JCVI), reiterated MHRA’s stance on the AstraZeneca vaccine.

He told BBC Radio 4’s Today programme on Thursday: “I think one thing we can say at this moment is that the benefits (of the vaccine) outweigh the risk.

“As things stand, the risks of Covid, and of blood clots indeed caused by Covid, are massively greater than the risks that may conceivably exist as a result of receiving this vaccine.

“We are in a state of uncertainty at this point about all of this. We don’t know for sure about the causal relationship. And we don’t really know, critically, what the mechanism is and so what implication that might have even for other vaccines.”

Many vaccines currently in use “do have very rare, unexpected serious side effects but we still use them because the balance of risk and benefit is greatly in favour of using them,” he added.

“It could turn out that that’s the case for either one or even more than one of the vaccines we’ve developed against Covid. So, it is always in the end a matter of balancing risk and benefit.

“Just as we all get up in the morning and go to work and take a mortal risk … we find that acceptable because we might die in a car accident or be knocked down by a bus. We have to get used to the idea that using vaccines and drugs and medicines is not without risk, but they’re very, very small risks, and the risks of not using them is obviously much greater.”

A leading expert in public health has said that the UK is not likely to see a third wave of Covid-19 infections on the scale of that which is currently sweeping through Europe.

Linda Bauld, professor of public health at the University of Edinburgh, told Times Radio: “I think we are in a very different position for two main reasons – the first one is that they are dealing with the B117 (variant) which unfortunately we exported to them and caused us huge challenges – still does – but much more in the winter.”

She continued: “More importantly, 11.6 per cent of citizens in the EU on average have been given their first dose of the vaccine – that’s all people, not just all adults – compared to over 40 per cent of people in the UK, so you can see they are in a different place than we are.”

Introducing vaccine passports could potentially “scupper things” for hospitality venues who are trying to reopen, according to Emma McClarkin, chief executive of the British Beer and Pub Association.

On whether life could be made easier for businesses by vaccine passports as it could mean there is no need for them to track and trace, she told BBC Breakfast: “This would be an additional burden put on to the pubs. We are desperate to get back open again. We are desperate to do that.

“We will play our part in test and trace but the additional burden of the vaccine passport could really, really scupper things.

“It could make it feel that we are discriminating against sections of the population that have not been offered a vaccination or are unable to have one like pregnant women or a grandad who is probably going to forget his actual vaccine passport because he does not have it on his smartphone.

“It is a difficult process for us to implement in venue and yet today we have not had a consultation with the Government about how we would do this in pubs.”

A cross-party group of over 70 MPs have launched a campaign against domestic vaccine passports, branding them “divisive and discriminatory”.

Politicians including Libera. Democrat Ed Davey and Tory 1922 committee chair Graham Brady said the certificates should not be used to “deny individuals access to general services, businesses or jobs”.

The launch of the campaign comes just days before Michael Gove is expected to announce the results of the government’s review into whether such documents should become a reality, reports our Policy Correspondent Jon Stone.

Chris Whitty has spoken of “several really dangerous near misses” on the first day of the rollout of the Pfizer coronavirus vaccine which led to changes in procedures when jabs are given.

England’s chief medical officer said the “severe near-miss anaphylactic reactions” led to a 15-minute monitoring period being introduced after each jab.

He also predicted a “wide portfolio” of coronavirus vaccines could be available in two years but warned caution over the virus would be needed in the meantime due to the threat of new variants.

Police chiefs have warned that enforcing new lockdown rules may be “almost impossible” ahead of a long Easter weekend which is likely to see people across the country meeting outdoors.

The easing of tight lockdown restrictions after three months led to vast crowds gathering together on beaches and in parks across England this week, drawn out by new freedoms and balmy temperatures.

National Police Chiefs’ Council chair Martin Hewitt described some of the rule-breaking scenes as “disgraceful” and said officers were still encountering garden parties involving dozens of people.

My colleagues Andy Gregory and Vincent Wood have the story:

Good morning, and welcome to The Independent’s liveblog following the latest updates in the coronavirus pandemic.