IT journalist Guy Kewney was amazed to see another man appear on a plasma screen with a banner showing his name as he waited in the BBC News 24 reception for an interview. 

The mix-up happened when a cab driver, who it appears was booked to pick up Kewney at the end of the interview, responded to a call for his name in reception.

The real Kewney is a white man with a beard, while the cab driver is a clean shaven black male.

It appears that the taxi driver did not realise the mistake even when he was led into a studio and wired for sound.

However, as the video of the interview shows (courtesy of the Daily Mail), the cabbie soon cottoned on when he was announced as the editor of the technology website NewsWireless. 

The real Kewney said on his NewsWireless blog: "Watch his incredible recovery, and his determination to show that this may be a complete surprise to him but that he can out-Kewney any darned NewsWireless editor if he has to."