The mother of missing four-year-old Madeleine McCann is to be interviewed on her own by police on Thursday, a spokesman for the family said.

The McCanns, Kate and Gerry, have previously attended regular informal meetings with police as a couple.

A source close to the family said Gerry McCann was expected to be interviewed by police on Friday.

The moves come after Portuguese police received partial results of forensic evidence analysed in Britain.

"Kate is going in without her husband to answer questions regarding the case," the family spokesman said, adding that she was happy to cooperate with police in the investigation.

Madeleine vanished on May 3 from her bedroom in the Praia da Luz resort in the Algarve and the new evidence, which was found by sniffer dogs in the holiday apartment, could shed more light on the case.

"I can confirm that we have received part of the results and the team is satisfied (with the results)," said Portuguese police spokesman Olegario de Sousa. The evidence was sent to the Forensic Science Service in Birmingham last month. Newspapers reported it included a sample of a speck of blood found on the wall of the McCanns' holiday apartment.

A Briton living in Praia da Luz has been identified by police as the only suspect in the investigation and his house has been searched twice.