There is a “high degree of confidence” that vaccines protect against the Indian variant of COVID-19 – but it can “spread like wildfire” among those who haven’t had a jab, Matt Hancock has told Sky News.

The health secretary urged those who are eligible for vaccination – but have not yet booked an appointment – to come forward to get their vaccine as he warned against the possible impact of the Indian variant.

Mr Hancock said the variant, which is feared to be more transmissible than the Kent variant which drove the UK’s deadly second wave of infections this winter, was “becoming the dominant strain in some parts of the country”.

But he said the government was deploying thousands of extra tests this weekend in some parts of England to try to get a hold on the spread of the India variant.

There have been concerns that the spread of the India variant in the UK could derail the government’s roadmap for easing lockdown restrictions.

But Mr Hancock said tomorrow’s planned easing to stage three of the roadmap – allowing indoor mixing between households – would still go ahead.

And a decision would be announced on 14 June as to whether the country would proceed to stage four a week later, when ministers aim to remove all legal limits on social contact.

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“We need to be cautious, we need to be careful, we need to be vigilant and we’ve said – at each step – we will look at the four tests that we have,” Mr Hancock told Sky News’ Sophy Ridge on Sunday show.

“We assessed those last week for the move we’re making as a country tomorrow and our assessment was all four are met.

“The fourth of all those four tests is if a new variant knocks us off course.

“We’ll, of course, be assessing that over the weeks to come and we’ll make a final decision for the step four, which is the biggest step on the roadmap.

“We’ll make that final decision on 14 June.

“We’ve always said we want this to be cautious, we really want it to be irreversible. New variants are one of the biggest risks to this opening.

“Because of the speed of transmission of this one, it can really spread like wildfire amongst the unvaccinated groups – hence we need to get as many people vaccinated as possible, particulary among those who are most vulnerable to ending up in hospital.”