Seven suspects in the disappearance of Madeleine McCann have one week before police officers from Scotland Yard arrive to carry out interviews.
Efforts to find out what happened to the missing British child will be stepped up next Monday when Operation Grange officers land in the Portuguese Algarve.
Also set to be interviewed are four witnesses, who it is hoped can shed light on what happened when Madeleine disappeared from her room in the Ocean Club resort in Praia da Luz in 2007.
The Metropolitan Police have refused to discuss details, but will be hoping the interviews which begin on 8 December will yield useful information.
Efforts to uncover Madeleine's whereabouts have been thwarted so far, with a search of scrub land in Praia da Luz drawing a blank earlier this year.