The Prime Minister today welcomed the news that the Metropolitan Police is to investigate Madeleine McCann's disappearance.
He was criticised by opposition MPs two years ago when, after receiving a letter from Madeleine's parents, he asked the Met to review the evidence in the case.
There are no tickets left for the Derbyshire Falcons’ Friends Life t20 derby versus Nottinghamshire Outlaws today.
The organisers say there will be no tickets sold on the gate and only those with a valid match-day ticket, Six Pack Ticket or Membership card will gain entry to the County Ground.
Members and Six Pack Ticket holders are being asked to arrive early to guarantee that they get in.
A specific number of tickets have been held back to ensure entry for the projected number of Members and Six Pack Ticket holders, but the only way to guarantee entrance is by arriving with plenty of time in hand.
Speaking at Evelina Children's Hospital in London today during celebrations of the 65th birthday of the National Health Service, Mr Cameron said: "It is welcome because they say that there is new evidence, new leads to follow, new things to be done.
"It was a case that did shock and still shocks the nation and if an answer can be found we should try and find it."
The Metropolitan Police said yesterday that detectives had identified 38 people of interest including 12 UK nationals following a two-year review of evidence in the case.
David Cameron has welcomed the decision by British detectives to launch their own investigation into the disappearance of Madeleine McCann.
Mr Cameron said the case of the then three-year-old who went missing from a holiday apartment in Portugal's Algarve in May 2007 was one that continued to shock the nation.
Scotland Yard yesterday said it was launching its own investigation into her disappearance, saying it had "genuinely new" lines of inquiry and believed there is a chance she is alive.
British detectives who've reopened the case of Madeleine McCann say they're investigating 38 people in connection with her disappearance.
Madeleine, then aged three, went missing while on holiday in Portugal in 2007.
Keith Wilkinson reports on the new lines of inquiry.
A former chief superintendent at Scotland Yard said the force should have been "brought in from the outset" to deal with the Madeleine McCann disappearance.
It comes as the head of the new full-scale Metropolitan Police inquiry into the Leicestershire child's disappearance has said there are 38 persons of interest, including 12 British nationals, that they want to speak to.
Mr Davies said: "The lesson surely has to be that you involve professional police forces who have the experience and ability in a global scenario in terms of kinap and ransom.
"Scotland Yard are arguably one of the best in the world, they should have been brought in from the outset as I did call for."
Detective Chief Inspector Andy Redwood, head of the investigation into Madeleine McCann's disappearance, has said that they want to talk to 38 people from across Europe - including 12 UK nationals - in connection with they inquiry.
The missing girl's parents Gerry and Kate are not among the people of interest.
The McCann family has welcomed the Metropolitan Police's shift from a review to an investigation into missing Madeleine.
– McCann family statement
It is clearly a big step forward in establishing what happened and, hopefully, towards bringing whoever is responsible for Madeleine's abduction to justice.
The Met Police has announced that the review into Madeleine McCann's disappearance has now become an investigation with 38 people, including 12 UK nationals, identified as "persons of interest".