Portuguese police have asked Madeleine McCann's parents to return to the Algarve to stage a reconstruction of the night their daughter went missing.
Kate and Gerry McCann and their lawyers are considering the proposal and have yet to decide whether to go.
A family spokesperson said that a televised reconstruction was suggested by the McCanns and BBC Crimewatch last year, but was turned down by the Portuguese authorities.
The McCanns, who are still suspects in the case, flew home last September after days of police questioning.
Their daughter disappeared on 3 May during a holiday in the Algarve region of southern Portugal.
Portuguese detectives arrived in England yesterday to attend interviews with a group who were with the McCanns on the night Madeleine went missing.
The McCanns believe their daughter was abducted from their holiday apartment while they were dining with friends.
They hired private investigators to help find their daughter after Portuguese police named them as suspects in September.
Two British tabloid newspapers made unprecedented front page apologies last month to the McCanns for suggesting they might have killed their daughter and covered up her death.