Darren Rathband, the twin brother of blinded Pc David Rathband, paid an emotional tribute to him at a cathedral service in Newcastle.
Among the mourners at St Nicholas' Cathedral, Newcastle, were Policing Minister Nick Herbert, actor Tim Healy and Northumbria Police chief constable Sue Sim.
The officer's children Mia, 13, and Ashley, 19, were seated at the front of the historic church.
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A chilly night for some
Up to a million people were expected to attend on Sunday, with the day dedicated to children and families.
Nick Thomas, an experienced endurance athlete, set off from Dover on Saturday morning.