A MEMORIAL service is to be held today to remember the 22 victims of the Manchester Arena suicide bombing at a pop concert a year ago.
Here is all you need to know about the event to commemorate Britain's deadliest attack for more than a decade.
When does the Manchester attack anniversary memorial service begin?
PM Theresa May will join Prince William at a memorial service in Manchester May 22, 2018, (TODAY) to remember the 22 victims of a suicide bombing at a Ariana Grande pop concert a year ago.
The service takes place from 2-3pm.
The hour-long service of commemoration will be held at Manchester Cathedral, including a nationwide one-minute silence at 2.30pm.
It will be screened in the Cathedral Gardens for the public as well as at York Minster, Liverpool Metropolitan Cathedral and Glasgow Cathedral.
William will meet some of the bereaved families privately afterwards.
When is the Manchester Together - With One Voice event?
More than 3,000 singers from local choirs will join forces and share the spirit of solidarity at the Manchester Together - With One Voice event in the city's Albert Square from 7pm-9.30pm.
Among those performing are the Manchester Survivors Choir, a group made up of people who were at the arena on the night of the fateful concert, and Parrs Wood High School's Harmony Group, whose post-attack tribute went viral last year.
A mass communal singalong finale from 8.30pm-9.30pm promises to be the highlight of the concert, with songs including Ariana Grande's One Last Time, One Day Like This by Elbow, Don't Look Back In Anger by Oasis and Take That's Never Forget.
MORE ON THE MANCHESTER ATTACK
What else will mark the terror attack?
The five-day vigil There Is A Light, is taking place from May 22-26.
Lyrics from songs chosen by victims and the general public will be reflected on to the pavements and buildings in St Ann's Square.
St Ann's Church will host an Embracing Manchester art exhibition, which has been inspired by a young Muslim man.
The church is also holding a flower festival until May 23.
The council has planned a Trees of Hope Trail, which will invite people to leave messages and tributes on trees placed around the city centre in the days before the anniversary.
At 10.31pm, bells will ring out from the city's Town Hall, St Ann's Church and St Mary's RC Church to mark the moment when the attack took place 12 months ago.
The city also hosted the Great Manchester Run on May 20, which included a one-minute silence for the victims of the attack.
Salman Abedi, 22, detonated his bomb device at the end of the concert with 353 people, including 175 children, around him in the foyer of the venue.
A total of 22 people were killed and more than 800 others were either physically or psychologically injured.
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