THE boss of the firm behind the Oxford/AstraZeneca Covid vaccine has raised hopes it is more effective than first thought amid rapid spread of the UK variant across the globe.

AstraZeneca chief Pascal Soriot told the Sunday Times he believed researchers had found the “winning formula” using two doses and promised to publish the results as the UK regulator could approve the jab within days.

The claim will come as some relief even as Canada became the latest country to identify cases of the new highly infectious variant of coronavirus, which was first detected in the UK.

Chancellor Rishi Sunak praised vaccination efforts so far, saying: “There will be tough days and months ahead, but there are reasons to look ahead to a brighter future and what 2021 promises.

“The early rollout of vaccines – and the incredible work of our scientists and NHS – means we can now see light at the end of the tunnel with this pandemic.”

But medical unions and Labour criticised the Government’s handling of the programme, which they said had not made enough progress in care homes.

Nadra Ahmed, chair of the National Care Association, told the Sunday Mirror the Pfizer/BioNTech rollout was going to be “difficult” but added: “It’s another case of the massive over-promise on something that just cannot be delivered. It’s constant.”

And Labour shadow health secretary Jonathan Ashworth told the paper there was a “race against time” to vaccinate enough people as he urged the Government to avoid what he said were “the same mistakes again” in being “too slow” to protect care home residents.

Cases of the variant strain have been confirmed across Europe including in France, Spain, Denmark, Italy, Iceland, Switzerland and Sweden, as well as around the globe in Australia, Japan and Lebanon.