The incident happened in Surbiton in the early hours of Saturday morning.
Yesterday, Brian Kingsford posted this picture of his son, Robbie, to a public Facebook group.
Facebook: 1499551236967478
A spokesperson for the Metropolitan police told the paper the pair were subjected to homophobic abuse by a man standing outside a YMCA – he and a friend punched Robbie's friend, and when Robbie tried to protect him, the pair kicked and stamped on him after he fell to the ground. The assault was only stopped after passers-by intervened.
The men were described as being in their late 20s and wearing pink tutus. One apparently had short brown hair; the other had shaven fair hair and was short and muscular.
It appears that progress has been made in the investigation.
Kingsford added that his son was "tired and hurting, but fine".
Robbie also wrote: "I have passed on the photos and names provided by people who would like to remain anonymous to the police and the officer I am dealing with. We may have a lot there now and it will make it easier to catch the people who did this to me. Thank you again and I hope one day I can return the favour and help you all somehow."
Facebook: brian.kingsford.14