Private detectives hired by Madeleine McCann's parents have released an image of a "Victoria Beckham lookalike" they hope to trace.
The woman, who had an Australian or New Zealand accent, was seen by two British men in Barcelona in Spain three days after the little girl went missing from Praia da Luz in Portugal.
The woman said something to one of the men which has convinced the McCanns' investigators that she might have information about Madeleine.
The two men first saw the woman when they were drinking in bars in Barcelona's Port Olimpic Marina at about 2am on May 7 2007.
She was said to be well-dressed but appeared agitated and kept walking up and down outside the El Ray de la Gamba restaurant bar, apparently waiting for somebody.
One of the witnesses, a 41-year-old British man, had a brief conversation with her in which she apparently thought he was the person she was scheduled to meet.
She said something to him that has made the McCanns' private detectives think she may know something about Madeleine.
The witnesses said the woman was aged between 30 and 35, short and slim, and described her as "a bit of a Victoria Beckham lookalike". She is said to have had an Australian or New Zealand accent, and is also thought to speak fluent Spanish or Catalan.
Madeleine was nearly four when she went missing from her family's holiday apartment in Praia da Luz in the Algarve on May 3 2007 while her parents dined with friends nearby.
Despite a massive investigation by Portuguese and British police and huge publicity worldwide, she has not been found. It emerged this week that Leicestershire Police have spent nearly £750,000 investigating her disappearance.
