They are ? in what way can OG help investigate CB, is there any indication he visited the UK ?
Yes they are:
Dame Cressida said that the Met's position had not changed since the summer, when the force said its investigation - Operation Grange - remained a missing person inquiry as there is no "definitive evidence whether Madeleine is alive or dead".
She said a small team of Met Police investigators continued to work "very closely" with police in Germany and Portugal.
"We will continue until the time that it is right, either because much more light has been thrown on this or somebody has been brought to justice," she said.
"Or if we feel we have exhausted all possible opportunities. We're not at any of those stages at the moment, and the team continues."
Despite the close co-operation, she said she did not expect "every single piece of material to be shared with us".
"I'm sure they're sharing the relevant things at the relevant times with us," Dame Cressida said.