Prince Charles will say he is inspired, humbled, and moved by the sacrifices seen in the past year, as part of tomorrow's day of national reflection.
© PAPrince Charles: 'Let us take a moment... to acknowledge the inexpressible pain of parting'
23 March is the anniversary of the first UK lockdown.
The Prince of Wales is urging Britons, "whatever their faith or philosophy," to pause on Tuesday in remembrance of those who have died during the crisis in the past year.
A minute's silence will be held at 12pm, followed by a bell toll, and people are being encouraged to stand on their doorsteps at 8pm with phones, candles and torches to signify a "beacon of remembrance".
The commemoration is organised by the end-of-life charity Marie Curie which estimates more than six million people have been bereaved since the coronavirus pandemic began.
In a recorded message, Charles, who is a patron of the charity, said: "We have all been inspired by the resourcefulness we have witnessed, humbled by the dedication shown by so many, and moved, beyond words, by the sacrifices we have seen.
"Whatever our faith or philosophy may be, let us take a moment together to remember those who have been lost, to give thanks for their lives, and to acknowledge the inexpressible pain of parting.
"In their memory, let us resolve to work for a future inspired by our highest values, that have been displayed so clearly by the people of this country through this most challenging of times."
More than 250 organisations are supporting the day of reflection, including 82 leaders from religious groups and cross-party politicians, care organisations, charities, businesses, emergency services, public sector bodies and community groups.