Professor Ferguson told the BBC he felt 'optimistic' about the UK's immediate future, adding: 'In the worst case scenario, if we have a new variant pop up which does manage to evade the vaccines, say late summer early autumn, there may be a need to roll back on some of these measures at least temporarily until we can boost people's immunity.
'Do I think it's likely to happen? No, I don't. I think we are much more likely to be on a steady course now out of this pandemic, at least in this country.'
Fears about a devastating third wave of disease this summer, which the Prime Minister had been forced to accept was inevitable, are now calming.
Even SAGE experts think it is 'very unlikely' that there will be a devastating spike in cases when lockdown ends.
Thanks to vaccines effectively cutting transmission as well as preventing serious illness, modellers trying to predict future outbreaks suggest the danger has been lessened.
New possible scenarios are set to be published next week by government scientists, The Times reports, that will show a reduced risk from reopening in the summer.
Professor Graham Medley, SAGE adviser and London School of Hygiene & Tropical Medicine, told the paper: 'The good news about the vaccination effect means that some of the scenarios about very large waves later in the summer are now very unlikely.'
With science now proving the Covid vaccines work well in the real world, Britain has has ordered an extra 60million doses of the Pfizer jab, taking its total order to 100m in preparation for the booster rollout later in the year.
These doses are the same as the Pfizer ones currently being given out and have not been tweaked to target new variants specifically. But pharmaceutical companies are also developing and trialling variant-specific jabs and either type could be used for the autumn rollout, due to begin in September.
And the Department of Health said it will 'future-proof' the country's defences against new variants by setting up a research hub to quadruple the number of variant tests carried out each week from 700 to 3,000.
This will speed up the recognition of new strains and help officials to work out which ones are circulating in the UK and where, allowing them to do surge testing and develop new vaccines if necessary.
Dr Jenny Harries, chief executive of the UK Health Security Agency, said: 'While we expect the existing vaccines to offer protection against new variants – particularly preventing serious illness and death – it is important that we continue to monitor the picture as it develops.'
Vaccines minister Nadhim Zahawi said on BBC Breakfast this move would 'future-proof the vaccination programme for next year and the years beyond that, as we move from pandemic to endemic and deal with it in the way we would deal with the annual flu vaccination programme.'
Speaking to Sky News about the booster vaccines he said the country was stockpiling the extras, adding: 'Pfizer is one option, we’re going to give [people] an AstraZeneca option – we’re working with the team on a vaccine variant.
'Clinicians haven’t yet made the decision when they will need to boost, whether to give more immunity to the most vulnerable, to increase the durability of the protection or to deal with the variant.'
The news comes after Britain dropped demands for India to release five million doses of the Oxford/AstraZeneca vaccine destined for the UK.
Whitehall sources said efforts to lift the export ban imposed in March by the Indian government had been ‘put on the backburner’.
It comes amid concern about the dire state of the pandemic in the country, where Covid cases have soared past 20million.
There were 6million Covid cases globally last week, compared to 6million in the first five months of the pandemic
Public Health England has divided the Indian variant in three sub-types because they aren't identical. Type 1 and Type 3 both have a mutation called E484Q but Type 2 is missing this, despite still clearly being a descendant of the original Indian strain. It is not yet clear what separates Type 1 and 3
Cases of Coronavirus in India has soared to more than 20 million in recent weeks as the crisis continues
India's first drive-in Covid vaccination facility in Mumbai
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People wearing protective face masks wait to receive a dose of COVISHIELD, a coronavirus disease (COVID-19) vaccine manufactured by Serum Institute of India
London's G7 is hit by Indian Covid outbreak: Two members of Indian delegation test positive
Dominic Raab today tried to shrug off the Indian delegation to the G7 foreign ministers' summit in London going into self-isolation after positive coronavirus cases.
The Foreign Secretary said 'we are all having to adapt in agile ways' as he kicked off the second day of the gathering after the dramatic news.
Government sources have confirmed to MailOnline that two members of the Indian delegation have tested positive, and the whole group is now believed to be in isolation as a precaution.
India is not part of the G7 but they are attending the gathering - the first major face-to-face meeting since the pandemic erupted. The delegation is thought to have been exempted from quarantine rules, but have been tested daily.
The cases were picked up by Public Health England last night, before the delegation was due to join G7 meetings at Lancaster House today.
Priti Patel met the Indian foreign minister Subrahmanyam Jaishankar at the Home Office yesterday, although he is not believed to be one of the positive cases. He is now taking part in the meetings remotely.
Another government source said PHE had advised that the UK delegation does not need to isolate, as social distance was observed and masks were worn. During the formal sessions the ministers sit round a table separated by clear screens to minimise risks.
The revelation threatens to throw the summit into chaos. It was meant to be Covid secure and demonstrate that international diplomacy can get back to normal ahead of the full G7 summit in Cornwall next month.
That is due to be attended by US president Joe Biden among other world leaders.
Dr Jaishankar tweeted this morning: 'Was made aware yesterday evening of exposure to possible Covid positive cases.
'As a measure of abundant caution and also out of consideration for others, I decided to conduct my engagements in the virtual mode. That will be the case with the G7 Meeting today as well.'
Boris Johnson held talks with Indian PM Narendra Modi over video link yesterday.
The news came amid rising fears about Indian Covid variants, with figures suggesting they now make up one in 10 cases in London. Data from the Sanger Institute, which analyses positive swabs for different variants, suggest the mutant strains spread widely during April.
Mr Johnson held wide-ranging talks via video link with his Indian counterpart Narendra Modi as part of plans to deliver a ‘quantum leap’ in relations between the two countries in the next decade.
Downing Street said the two leaders talked about the need to boost ‘pandemic resilience’.
In a statement released afterwards, Mr Johnson highlighted Britain’s assistance with the crisis in India, which includes the provision of oxygen equipment and ventilators.
He said: ‘In the last week the British people have stepped up in their thousands to support our Indian friends during this terrible time in a demonstration of the deep connection between the UK and India. This connection will only grow over the next decade as we do more together to tackle the world’s biggest problems and make life better for our people.’
In March, the Prime Minister despatched his senior aide Lord Lister to try to secure the release of five million doses of the Oxford/AstraZeneca vaccine produced by the Serum Institute of India.
At the time, the institute – the world’s largest vaccine producer – indicated that the export had been blocked by the Indian government.
The decision dashed hopes that the UK Government could fast-track the vaccination of all adults here ahead of the July target.
The issue was not directly raised during talks between the two leaders, although there was discussion of the need to ‘firm up international supply chains to ensure critical medicines, vaccines and other medical products reach those who need them most’.
But a Whitehall source said the UK’s request for the release of the doses had been shelved in the face of a crisis that has seen Indian hospitals overwhelmed in recent weeks.
‘I think it’s fair to say it has been put on the backburner,’ the source said. ‘It is not an immediate prospect.’ While the UK has given at least one vaccine dose to more than half the population, the equivalent figure in India is less than 10 per cent.
The talks followed the cancellation of the PM’s planned visit to India last month, which was ditched at the last minute because of the crisis. Mr Johnson sees India as a key post-Brexit ally, both economically and strategically.
The two leaders agreed a '2030 roadmap' covering co-operation across health, climate change, education, science and technology, and defence. It also included a commitment to an ‘enhanced trade partnership’ paving the way for a full free trade agreement aimed at doubling bilateral trade over the next decade.
Mr Johnson said: ‘The UK and India share many fundamental values. The UK is one of the oldest democracies and India is the world’s largest. We are both committed members of the Commonwealth. And there is a living bridge uniting the people of our countries.’
A free trade agreement with New Delhi is seen as a huge prize for the UK Government following Britain’s withdrawal from the EU.
Ahead of the talks, Mr Johnson announced a £1billion trade deal with India which he said would create more than 6,000 jobs.
A strategic ‘tilt’ towards the Indo-Pacific region was one of the key objectives set out iln the Government’s recent Integrated Review of foreign and defence policy.
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