Humanist celebrant Carly Fee told the congregation assembled at Stafford Crematorium that the policeman’s family were “unanimous” his funeral should be a celebration of his life.
She said the song – which drew laughs from some of the mourners – was chosen because “it encapsulates David’s own optimistic outlook and irrepressible humour”.
PC Rathband, a father of two, was shot by gunman Raoul Moat in July 2010. He hanged himself at his home in Blyth, Northumberland, on 29 February.
Among the mourners was PC Rathband’s estranged wife Kath, who attended the ceremony despite being asked to stay away by his identical twin brother Darren.
Darren Rathband delivered a eulogy, saying: “We were the image of each other, but I can never come close to the man he was.”
Recalling the last time he saw his brother alive – when he visited his home in Australia – he said: “It broke my heart seeing him arrive in Adelaide. He was a shattered man, he looked so tired and frail, and the scars were so clearly visible.”
Darren Rathband said his brother struggled with his blindness, and had found the flight to Australia difficult.
“This was my brother’s new life, and it wasn’t first class,” he said, adding: “Sadly we are a broken family from his passing and there is grief in all of us. I hope that those who carry a burden after his death carry it with themselves and don’t aim to lay that at his graveside.
“It is just as cowardly to judge an absent person as it is wicked to strike a defenceless one.”
Referring to the manner of his brother’s death, he added: “Some of us will question why, but try to understand his loneliness.
“The darkness he could not share with anyone.
“When you close your eyes tonight you will have just the thinnest idea of the dark life David had to endure.”
He continued: “I just hope the memory of my brother is not tarnished by others who feel the need to set the record straight. Because the record is simply this: PC Rathband succumbed to his injuries and the struggle with life, having been shot by a coward who will remain forgotten.”