"It was designed to strike at the heart of our values and our way of life, in one of our most vibrant cities, with the aim of breaking our resolve and dividing us. It failed," she said.

Britain's interior minister, Home Secretary Sajid Javid, said: "Today my thoughts are with the victims and their families as we honor their memories one year on from that terrible day in Manchester."

Tributes were also made by the city's two Premier League football clubs, City and United, with Manchester United saying: "Always Remember. Never Forget. Forever Manchester."

Meanwhile, Greater Manchester Police is continuing its investigation into whether suicide bomber Salman Abedi had accomplices or was supported in his attack.

Detectives are continuing to investigate the Manchester bombing as a live murder inquiry, with a sustained team of around 100 police officers on the case.

Assistant Chief Constable Russ Jackson said: "The events of May 22 will forever be etched into the history of Manchester. The attack at the Manchester Arena has had an enormous impact on the families of the 22 individuals murdered and the hundreds more injured and traumatized. Many officers and staff saw and dealt with things that no one should have to deal with."

Salman Abedi's brother Hashem Abedi remains in custody in Libya, with Britain seeking to extradite him back to Britain to stand trial for allegedly helping the plot.