- Video report by ITV News Correspondent Paul Davies
Thousands of police officers from every force in the country have lined the streets of London for the funeral of Pc Keith Palmer, the officer murdered in the Westminster terror attack.
Pc Palmer's funeral cortege began at the Palace of Westminster, making its journey through the streets of the capital he once protected, heading to Southwark Cathedral via Lambeth Bridge.
A flower display on the funeral car spelt out "No.1 Daddy".
Members of the public gathered along the route to show their support, alongside members of the London Fire Brigade and the London Ambulance Service.
Pc Palmer's body had lain at rest in Westminster's Chapel of St Mary Undercroft overnight, an honour normally reserved for heads of state, after the Queen gave her assent.
Spontaneous applause rang out in Parliament Square as the cortege left Westminster to make its way to Southwark Cathedral.
Commissioner of the Metropolitan Police Service, Cressida Dick, read an emotion poem during the service and later paid tribute to the fallen officer, describing him as "a friendly face of British policing."
She said: "Keith was an extraordinary man. We've just finished a terribly, terribly sad and poignant service to say goodbye to Keith and also to celebrate an amazing life.
"He was clearly a kind, very good-hearted, very hard-working... talented police officer."
She added: "In this horrible, horrible sad time, I think all of us in policing hope today's tribute to him gives some small comfort to his family - who we can't possibly imagine what they've been going through.
"We're incredibly proud of him, and we know they are too. All our hearts are with them."
Ahead of the funeral Pc Palmer's name was added to the roll of honour and remembrance at a ceremony at the National Police Memorial on The Mall, in central London, complete with a guard of honour.
- Colleagues remember Pc Keith Palmer:
Around 50 members of Pc Palmer's family - including his wife, child, mother and father, brother and sisters - attended the service, which was led by the Dean of Southwark, The Very Reverend Andrew Nunn.
The service was followed by a private cremation.
Hundreds of people gathered at Southward Cathedral, with many watching the funeral ceremony on giant screens erected outside.
Home Secretary Amber Rudd, Her Majesty's Lord-Lieutenant of Greater London Kenneth Olisa; the Mayor of London, Sadiq Khan; the Mayor of Southwark, Councillor Kath Whittan and the Deputy Mayor for Policing, Sophie Linden were also in attendance.
Earlier officers and police forces around the country shared their tributes to Pc Palmer.
PC Barry Calder tweeted a photo of his uniform, saying the day would be "emotional" but that he is "proud" to wear the same uniform as Pc Palmer.
Horncastle Police shared a photo of a rose left outside the police station, saying it was a "fitting tribute" to the officer.
Pc Steve Richardson, a senior section officer with the West Yorkshire Police, told the Press Association that he travelled down from Leeds to attend the service with 35 other officers.
"It's a sense of pride to support your colleagues at this sad time," he said.
"It's quite difficult stuck up north when this happens in London. You feel powerless and want to help but you can't, so coming down means a lot.
"The thin blue line may be slightly thinner, but it certainly can't be broken."
Pc Palmer died after he was stabbed by Khalid Masood during the Westminster attack on March 22.
Four other people - Andreea Cristea, 31, Leslie Rhodes, 75, Kurt Cochran, 54, and Aysha Frade, 44 - were killed and dozens of others injured in the attack, which ended with Masood being shot dead.