article_snippet: Yet despite costing the taxpayer £10million and dozens of trips by officers to the Algarve, the inquiry – codenamed Operation Grange – has not led to a single arrest.
article_snippet: Operation Grange was set up to review the original Portuguese police probe into the disappearance of Madeleine, then three, from the family’s holiday apartment in Praia da Luz on May 3, 2007.
article_snippet: Detective Chief Inspector Nicola Wall, who took over Operation Grange in December, and Madeleine team ravelled to Portugal to interview seven suspects and four witnesses, but have not released any information about what Detective Chief Inspector Nicola Wall, who took over Operation Grange in December, and her team discovered.
article_snippet: A The Metropolitan Police spokesman said: ‘There are 31 officers working on Operation Grange.
article_snippet: Detective Chief Inspector Nicola Wall, who took over Operation Grange in December, and her team sole investigation is the disappearance of Madeleine McCann.’
highlights_snippet: Operation Grange has cost the taxpayer £10million since 2011 .
  
highlights_snippet: Not led to a single arrest and now facing calls for Operation Grange to be axed .