Drinkers told they must wear masks in pub beer gardens 'Light at end of tunnel' for summer holidays Prince Philip's funeral will be 'family affair' due to Covid restrictions Ben Marlow: Monday's grand reopening is a moment of truth Subscribe to The Telegraph for a month-long free trial Blood clots associated with the Johnson & Johnson vaccine are "extraordinarily rare", a scientist advising the Government on its coronavirus response has said. The UK has ordered 30 million doses of the vaccine, which is also known as Janssen, although it is yet to be approved for use by regulators. "We still don't know whether they are directly related and caused by the vaccine but it seems possible that they could be," Professor Peter Openshaw, a member of the Covid-19 clinical information network, told the Today programme. "It wouldn't be surprising to find the J&J, the Janssen vaccine, also causes rare blood clots because it's based on an adenovirus technology which is not that far away from the technology being used in the AstraZeneca vaccine." Prof Openshaw said any blood clots were "extraordinarily rare events" and likened the risk level to "if you [were to] get into a car and drive 250 miles". It comes a day after the European Medicines Agency said that it has started a review to assess blood clots in people who have been given the Johnson & Johnson jab. Follow the latest updates below.