It comes after an inquest ruled the the victims were unlawfully killed
Each of the 96 victims of the Hillsborough disaster will be remembered later during a vigil in Liverpool.
The names and ages of those who died will be read outside St George's Hall, where a memorial emblazoned with the words 'Truth and Justice' stands over a row of 96 lanterns.
It comes after an inquest jury ruled they were unlawfully killed.
The jury concluded the behaviour of fans was not a factor in the tragedy, which happened when supporters were crushed before Liverpool's FA Cup semi-final against Nottingham Forest on April 15th, 1989.
The jurors also found that errors by the police and ambulance service had "caused or contributed" to Britain's worst sporting disaster.
South Yorkshire Police Chief Constable David Crompton said the force "unequivocally" accepted the findings, and admitted: "The force failed the victims and failed their families".
Rod Barnes, the current head of Yorkshire Ambulance Service NHS Trust, said he was "truly sorry" and admitted lives could have been saved if its response had been different.
There are now renewed calls for further legal action.
But Neil Bowles from the South Yorkshire Police Federation says most officers were only trying to do their jobs.
Operation Resolve, the continuing police inquiry into the events of the day and its lead-up, and the probe by the Independent Police Complaints Commission (IPCC) into the aftermath of the disaster, are due to send their final case files to the Crown Prosecution Service (CPS) by the end of the year.
Any decision on charges by the CPS is expected to follow within three to six months.
The British Home Secretary Theresa May will appear before MPs later to set out the government's response.