Ministers could consider reimplementing restrictions if the spread of the virus becomes "unacceptable", according to the Solicitor General.
Lucy Frazer said some measures could be re-imposed, despite the Prime Minister regularly stating he wanted the removal of most legal measures in England on July 19 to be "irreversible".
The government's top medic, Professor Chris Whitty has also warned the number of people in hospital with coronavirus could reach "quite scary" levels within weeks.
READ MORE: Chris Whitty warns England could be back in lockdown within weeks
Lucy Frazer told Sky News: "I think the Health Secretary has been very clear, as has the Prime Minister, that we will see infections rise.
"But the reason why restrictions are being taken away is because of the vaccination programme, which will protect people when those infections do rise.
"Of course, if we get into a situation where it is unacceptable and we do need to put back further restrictions, then that of course is something the Government will look at.
"But we are going into the summer, a large number of people have been vaccinated, we've had a really tough time, we're still asking people to take responsibility and we do need to ask ourselves, if we don't open up now, when will we be able to open up?"
Ms Frazer also said that while unlocking next week would cause deaths to rise, there were "consequences" to continuing with coronavirus restrictions.
Ms Frazer told Sky News: "I don't think that the Health Secretary (Sajid Javid) has suggested anything otherwise than the infection rate is going to rise and, as a consequence of the infection rate rising, that means, because there is a link between the two, that it follows that hospitalisations and deaths will rise as well.
"But there are also consequences for not opening up, real consequences not just to people's jobs and the economy, but to mental health as well and also to people who haven't been going to the doctor because they fear it.
"It is really important that we get the balance right between ensuring that we keep this virus under control and we take the necessary clinical measures to do that, but that we also recognise that there are consequences of not opening up and not allowing people to go about their daily lives."
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