The UK is marking one year since the first coronavirus lockdown was announced.
With the lockdown have come tough restrictions on socialising, closures of schools, pubs and shops with many rules currently still in place.
A minute’s silence will be held at midday as part of a day of reflection.
A year on, Mr Johnson has praised the “great spirit” shown since that moment and he offered his condolences to those who have been bereaved during the pandemic.
People are also being encouraged to stand on their doorsteps at 20:00 GMT with phones, candles and torches to signify a “beacon of remembrance”.
Doctors, nurses and teachers are calling on the prime minister to formally recognise an annual Covid Memorial Day – paying tribute to the efforts of front-line workers during the pandemic.
They are among those supporting a cross-party campaign, which has seen more than 50 MPs and peers sign a letter to the prime minister asking for a minute’s silence every year on 23 March to remember the lives lost.