www.telegraph.co.uk/news/newstopics/madeleinemccann/9497581/Yard-chief-suggests-Madeleine-probe-may-be-wound-down.html. The investigation has cost 2.5 million since it opened 15 mths ago at the request of David Cameron. Should the 'open cheque' continue for as long as it takes to find concrete evidence of what happened to her? Or should it be wound down as the Portuguese police refuse to reopen the inquiry? What do you think?