The walk began in a central London park before weaving through nearby streets, where shoppers, tourists and office workers paused to watch the procession. Many participants had gone all out with costumes, with dogs sporting elf ears, jingle bells and festive scarves, while owners embraced the theme with matching jumpers and hats. The result was a sea of red, white and wagging tails that brought a welcome dose of cheer to a chilly winter morning.