Madeleine was nearly four when she went missing from her family’s holiday flat in Praia da Luz in the Algarve on May 3 2007. She had spent that Easter in Donegal with her many relatives here.
Officers from Scotland Yard travelled to Spain yesterday to pick up around 30 boxes of documents, investigator Francisco Marco Fernandez told Spanish TV.
Mr Fernandez, who was hired by parents Kate and Gerry for six months, told the Ana Rosa Programme he provided police “with all the documents and information we have collated worldwide about Madeleine’s disappearance”
“I think there are six, seven or eight very important leads in there,” he added.
Police in London refused to comment but family spokesman Clarence Mitchell said: “Kate and Gerry will simply not be commenting whilst the Metropolitan Police review of Madeleine’s case is under way.
“They remain pleased that the Met team is continuing its work and that progress is being made.”
It is the second time officers are understood to have visited the Spanish city.
A team also spent three days with Spanish colleagues in Barcelona last month discussing the girl’s disappearance across the border in Portugal.
The Metropolitan Police force has said there would be no limits in its re-examination of the search.