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LONDON – British health officials expressed optimism Sunday that the coronavirus restrictions remaining in England can be lifted in June after an official study found that the Pfizer and AstraZeneca vaccines offer effective protection against the variant first identified in India. 

Authorities in Britain have expressed concern in recent weeks that increasing cases of the Indian variant could jeopardize the U.K.’s so-far successful plan to reopen its economy. More than 2,880 cases of the Indian variant have been recorded in England, figures show. 

The government has said the variant appears to be more transmissible, but there was still uncertainty about how concerning this was. 

Jenny Harries, chief executive of the U.K. Health Security Agency, said officials in England are on track to proceed with the final stage of unlocking the country from June 21 if the public remains cautious.