Health Secretary Sajid Javid has said he will keep wearing face mask on busy trains despite Boris Johnson's decision to repeal remaining Covid rules.
England's last pandemic restrictions will be axed from Thursday, with contact tracing and mandatory self-isolation to be scrapped.
Free testing will be drastically scaled back from April when only the elderly and most vulnerable will not be expected to pay.
The Prime Minister unveiled his plan to live with Covid on Monday as he sought to shift responsibility on staying safe from the virus onto the public.
Mr Javid warned that Covid is "certainly not done with us" as he told the public to remain cautious when all remaining rules are lifted.
On his morning media round, the Health Secretary said people should make individual decisions after examining the latest data on the virus.
He told LBC: "For now, although the infection levels have been falling significantly, week after week, I think where infection levels are at the moment, if I was on the London Tube, for example, and it was packed, I would wear a face mask."
Mr Javid said "these are now personal decisions, we want people to take more personal responsibility".
"I would look at what's the general prevalence, where case numbers are, where infection numbers are, hospitalisation numbers... we provide that data on a daily basis, it's there for everyone to see. I think taking all that into account, I would make a decision."
Mask rules are expected to be ditched on the London Underground in line with the scrapping of Covid restrictions.
It is currently a condition of carriage which means people are required to wear them.
London Mayor Sadiq Khan urged people to continue wearing a mask out of consideration for fellow passengers.
Mr Javid welcomed the decision to lift restrictions but urged people to continue to be vigilant.
He told Sky News: "Covid is still out there. We may be done with Covid, but it is certainly not done with us and we have to remain cautious and vigilant.
"That is why we set out yesterday just how we will continue to do that."
It comes as Nicola Sturgeon was due to outline a blueprint for easing Scotland's Covid restrictions on Tuesday.
The First Minister is expected to be more cautious than Mr Johnson, who announced an end to England's remaining pandemic rules within days.
A row is brewing between London and the devolved administrations over the decision to drastically scale back free testing from April.
