An investment banker ran out of his London home in his underwear to tackle a moped robber who was trying to break into his Mercedes in the street.

Video footage captured Stephen Canny, 33, grappling with the thief outside his apartment in Chelsea before throwing him to the ground and pinning him down.

The city worker was watching television with his girlfriend when they heard the back windows of their two Mercedes A200s being smashed.

Mr Canny immediately sprinted outside to confront Leon de Silva, 19, who was clad in full motorbike gear and a helmet having been on a robbing spree in the west of the capital.

As they wrestled, the former amateur rugby player shouted: "You picked the wrong car - you're going to pay for this in jail."

The teenager, who ended up with two black eyes, can be seen in the video attempting to wriggle out from underneath Mr Canny, but executive director for Volcap Trading, is heard shouting: "You ain't going nowhere mate. You must be stupid."

Asked if he would do the same thing if confronted with the same situation, the former back rower for Campion RFC in Romford, Essex, told MailOnline: "Of course I'd do it again. If it happened again tonight, I'd do the same thing again and I wouldn't even think about it.