The Health Secretary gave the grim figure as he insisted Boris Johnson is right to continue with the dramatic unlocking on July 19, saying the hospitalisations and deaths were what mattered.
The PM was also given a boost this morning as 'Professor Lockdown' Neil Ferguson said he is 'optimistic' the 'gamble' of releasing restrictions will work - although he cautioned that cases could hit 200,000 a day and they might need to be reimposed if vaccines are slightly less effective than hoped and deaths surge.
As well as the threat of severe illness, that scale of infections could cause chaos as people are 'pinged' by test and trace and forced to self-isolate.
However, in a round of interviews, Mr Javid revealed that he will be unveiling plans today to allow people who are double-jabbed to sidestep the isolation rules and do daily tests instead. Government insiders have raised doubts about whether the system can be in place for July 19.Insurance Loans Mortgage Attorney Credit Lawyer
Education Secretary Gavin Williamson is also due to set out proposals for scrapping school 'bubble' rules that have been causing huge numbers to stay away from classes.
Mr Javid said that by 'Freedom Day' he expects daily cases to reach 50,000 - nearly double the current level.
'As we ease and go into the summer we expect them to rise significantly and they could go as high as 100,000 case numbers,' he told BBC Radio 4's Today programme.
'We want to be very straightforward about this... but what matters more than anything is hospitalisation and death numbers. That is where the link has been severely weakened.'
Last night Mr Johnson signalled a 'big bang' end to lockdown on July 19, saying it was now or never for a return to normality despite the pandemic being 'far from over'.
He claimed further delay would run the risk of trying to reopen in autumn or winter when 'the virus has an edge'.
And at a sombre Downing Street press conference, Mr Johnson warned against going 'demob happy' at the ending of most coronavirus restrictions on July 19.
And he toned down previous pledges that the path out of lockdown would be 'irreversible' – with restrictions potentially returning. A final decision on whether to press ahead on July 19 will be taken at the start of next week but seems almost certain to be approved.
Dropping the curbs will mean the end of all legal limits on socialising, which have wrecked family gatherings for 16 months, and the scrapping of social distancing rules that have hobbled pubs, restaurants and the arts.
In other developments:Insurance Loans Mortgage Attorney Credit Lawyer The gap between vaccine doses was cut from 12 weeks to eight for the under-40s to give more people the protection of a second jab; Britain recorded another 27,334 cases of the virus, but only nine more Covid-related deaths; London Mayor Sadiq Khan said he would work with transport providers to keep mask rules in place; An official review of social distancing warned keeping the 'economically disruptive' one metre-plus rule in place would constrain the recovery; Health Secretary Sajid Javid said the requirement to isolate entire school classes and years would end on July 19; Mr Johnson said the cap on the number who can visit loved ones in care homes would be scrapped; The PM said he hoped to lift quarantine restrictions on fully vaccinated holidaymakers returning from amber list countries – but did not say when; Downing Street said social distancing would remain in airports, amid concerns about the virus spreading in arrival halls; Luxembourg PM Xavier Bettel, 48, was admitted to hospital in a 'serious but stable' condition with Covid, despite having been vaccinated
Boris Johnson (right) was given a boost this morning as 'Professor Lockdown' Neil Ferguson (left) said he is 'optimistic' the 'gamble' of releasing restrictions will work
Sajid Javid today admitted coronavirus cases could top 100,000 a day by August as the government pushes ahead with 'Freedom Day' - but insisted the 'wall of defence' from vaccines can hold
Sir Patrick Vallance Government Chief Scientific Adviser and Chief Medical Officer (CMO) for England, Chris Whitty, attend Downing Street Covid press conference
Professor Ferguson said 'policy will have to remain flexible' after coronavirus restrictions are lifted.
The Government adviser told Today: 'At the peak of the second wave 50,000 cases would translate into something like 500 deaths, but that's going to be much lower this time, more like 50 or so.
'The challenge is, there's still the potential of getting very large numbers of cases and so if we get very high numbers of cases a day, 150,000 or 200,000 it could still cause some pressure to the health system.
'This is a slight gamble, it's a slight experiment at the moment, and I think it's justifiable and I'm reasonable optimistic, but policy will have to remain flexible.
'If we end up in something close to the worst-case scenario we and other groups are looking at, which I think is unlikely but can't be ruled out, then yes there will need to be some course direction later.'
In a downbeat assessment slipped out in documents alongside the briefing last night, the Scientific Advisory Group for Emergencies (Sage) said that even if hospitalisations and deaths remained low, there were major risks in letting cases surge.
The group warned that should a 'variant of concern' arrive that threatened immunity, lockdown restrictions would need to reimposed for much longer.
Sage warned that some 'baseline measures' may have to stay, with 'sustained behavioural change' necessary.
Experts said self-isolation when ill would remain 'critical' and working from home was a 'highly effective' long-term option. And in a grim sign that Britons face a return of some curbs in the near future, Sage added: 'Stronger measures may be desirable for autumn and winter.'
The NHS will meet the challenge of rising Covid cases and 'learn to live with' the virus, health leaders insisted yesterday.
Professor Chris Whitty said that there is likely to be a surge in hospital admissions as Britain unlocks and the health service will also face a 'very tricky winter'. But he added that the NHS 'will cope with anything'.
There are currently 1,905 Covid-19 patients in NHS hospitals. This is double the number of one month ago, but down from a peak of almost 40,000 in January. Professor Whitty said hospital admissions could reach 'quite high numbers' but are unlikely to be as bad as previous waves.
Latest data shows infections are up 53 per cent in a week and yesterday another 27,335 cases and nine deaths were recorded in the UK.
NHS England's medical director Professor Stephen Powis said: 'We're well used to coping with pressures. We are prepared and, as you have seen over the last 18 months of the pandemic, the NHS will manage.'
Mr Johnson's decision to defy gloomy warnings from scientists and Labour leader Sir Keir Starmer was warmly cheered by business chiefs and Conservative MPs.
However there was confusion over quarantine for summer holidays, the end of mandatory mask wearing and the future of working from home.
Mr Johnson's leading scientific advisers appeared cautious at the press conference, with chief medical officer Chris Whitty saying the third Covid wave was 'significant and rising'.
Sage scientific advisers published documents saying there was a 'significant risk' in allowing cases to rise – and that restrictions might need to return this winter. And in a sign that the political consensus over Covid was fracturing, Sir Keir branded Mr Johnson's announcement 'reckless'.
At last night's briefing, Mr Johnson warned cases were predicted to rise to 50,000 a day later this month and that 'we must reconcile ourselves, sadly, to more deaths from Covid'.
But he declared: 'We must be honest with ourselves that if we can't reopen our society in the next few weeks, when we will be helped by the arrival of summer and by the school holidays, then we must ask ourselves: when will we be able to return to normal?'
He said a further delay would 'run the risk of either opening up at a very difficult time when the virus has an edge' in the autumn or winter or 'putting everything off to next year'.
Chief scientist Sir Patrick Vallance said Covid cases were doubling every nine days and hospitalisations were also rising, albeit at a slower rate. 'The vaccines have weakened the link, not broken it,' he said. Both he and Professor Whitty said they would continue to wear face masks in busy settings. Professor Whitty acknowledged there were 'some advantages' to reopening in the summer and Downing Street denied a claim from Dominic Cummings that the Prime Minister had overruled his scientific advisers.
In a bold shift despite daily Covid cases rising a fifth in a week to 27,000, Boris Johnson told a Downing Street briefing that the government will no longer issue 'top down' orders after July 19 and people must use their common sense to manage the risks
Boris Johnson pushed the button on a 'big bang' Freedom Day unlocking tonight with social distancing rules, mask laws and the work from home order set to go
Boris Johnson tonight firmed up plans for unlocking England on July 19.
The PM used a press conference to confirm a bonfire of virus rules and restrictions from the so-called Freedom Day, saying individuals will again be able to judge the risks of coronavirus for themselves.
However, he did not have any decisive announcements in key areas, with no date for quarantine requirements to be waived for double-jabbed Brits travelling to 'amber list' countries.
There was also no confirmation that self-isolation can be replaced with testing for the fully-vaccinated.
And although there was a clear intention for bubble rules in schools to be axed, it is not expected to happen until September when the new term starts.
WHAT THE PM ANNOUNCED:
Pubs and restaurants
Hospitality venues in England will no longer be required to collect track and trace data from July 19. Businesses won't have to ask customers to scan a QR code using the NHS phone app on entry or to hand over their contact details, although they will have the option of continuing to do so if they wish. Mandatory table service rules will also be scrapped, meaning drinkers will be able to order at the bar again in pubs.
Wearing masks will become voluntary everywhere apart from hospitals and other health facilities from July 19 in England. Public transport passengers, shoppers and those visiting pubs, restaurants, cinemas and theatres will no longer be required by law to cover up. However, people may still be encouraged to wear masks in some enclosed places where they come into close contact with each other, for example on London Tube trains.
Work from home
The official guidance telling people to 'work from home if you can' will be scrapped on July 19 in England. But it will be left up to employers and their staff to decide whether they have to go back to their desks. Ministers will not launch a campaign encouraging staff back to the office and are resigned to there not being a mass return to workplaces this summer.
AND WHAT THE PM DIDN'T ANNOUNCE
Ministers have been working on a system to open up holiday destinations for double-jabbed Britons.
People who have had both vaccine doses could no longer have to quarantine for ten days after visiting amber list countries, such as Spain, France and Greece.
However, there is not set to be any definitive news on the rules tonight and Government sources have cautioned the July 19 date is 'ambitious'.
TEST AND TRACE
Pressure has been growing for people who have received both coronavirus vaccine doses to be spared isolating at home for ten days if they have come into contact with someone who tested positive.
They could be offered lateral flow tests to do themselves at home instead.
However, ministers have not come to a conclusion on whether to go ahead, and it is understood a new system is very unlikely to be in place for July 19.
The bubbles system that has seen whole classes or year groups sent home if just one pupil tests positive for coronavirus will be scrapped in England.
Ministers are planning to announce a new way of handling outbreaks.
Instead of sending children home en masse, those who have come into contact with a positive case are likely to be given daily tests.
Few expect the arrangements