A minute's silence will be held across the UK later to commemorate the key workers who have died with coronavirus.
Prime Minister Boris Johnson, who returned to work on Monday, will join the tribute, which starts at 11:00 BST.
More than 100 NHS and care staff have died with the virus, as have many transport and other key workers.
It comes as the son of a doctor who died called on the government to issue a public apology for issues with personal protective equipment (PPE).
Intisar Chowdhury told BBC Radio 4's Today programme he wanted ministers "to accept their mistakes and let their mistakes become improvement rather than just ignore them and completely move on".
The 18-year-old also asked the government to make private apologies to the families of health and care workers affected.
Intisar's father, Dr Abdul Mabud Chowdhury, 53, who died earlier this month, had warned Prime Minister Boris Johnson about a lack of PPE five days before being hospitalised.
Health Secretary Matt Hancock was also asked by Mr Chowdhury to apologise on LBC, and said: "I think that it is very important that we're constantly learning about how to do these things better and I think listening to the voices on the front line is a very, very important part of how we improve."
A BBC Panorama investigation found the government failed to buy enough PPE to cope with a pandemic.
There were no gowns, visors, swabs or body bags in the government's pandemic stockpile when Covid-19 reached the UK, the programme reported.
Government minister Victoria Atkins told BBC Breakfast she was "very, very sorry to hear" of the Panorama report.
"Like every other country in the world, [the virus] is unprecedented and the requirements for PPE have risen exponentially and we're doing our absolute best to address those needs and will continue to do so," she said.
She added that, since the outbreak began, "a billion pieces of PPE" have been distributed across the UK.
The latest daily figures show a further 360 people died with the virus in UK hospitals, taking the total number of deaths to 21,092.
This number includes 82 NHS staff and 16 care workers who were confirmed to have died in hospital in England. A separate BBC News analysis of published figures found that at least 113 health workers have died with the virus across the UK.
Latest statistics released on Tuesday - which count coronavirus deaths in the community, not just in hospitals - found the total number of deaths across the UK in the week after Easter was more than twice as high as normal.
There were 24,686 deaths registered in the UK in the week after Easter - 12,832 more than the expected number of deaths for this time of year.
The Archbishop of York John Sentanu was among those inviting people to take part in the minute's silence for health care workers who have died - which coincides with International Workers Memorial Day,
"Workers should not be sent into danger without the correct PPE," he said and called for those on the front line to be "given all the safety equipment they need".
NHS England medical director Stephen Powis said the silence would ensure the health workers' "contribution is remembered and appreciated".
Chief nursing officer Ruth May added: "Every death is a tragedy but we feel the loss of fellow health and care workers particularly keenly."
A flag is to be flown at half mast at Lancashire Teaching Hospitals NHS Foundation Trust, which will be among many medical venues around the country where staff will pause to pay their respects to their colleagues.
Dame Donna Kinnair, chief executive and general secretary of the Royal College of Nursing, said the minute's silence "will bring together a sombre but grateful nation".
She added: "This must not be the last time that sacrifice is recognised. The country and its leaders owe a tremendous debt to these key workers and the many more who are on shift again today."
Labour Party leader Sir Keir Starmer said too many front-line workers had lost their lives, adding: "We owe it to them to make sure they've got the right equipment, in the right place, at the right time."
On Monday, the government announced that families of front-line NHS and social care staff who died with the virus in England would receive a £60,000 compensation payment.
Prerana Issar, NHS chief people officer, said that NHS England was considering how to formally commemorate all those who had died while working to care for others once the health service was through the peak of the virus.
Transport for London said the underground and bus network would be brought to a halt for the silence as the workforce honoured its colleagues, with passengers being asked to join in.
