I guess its not unreasonable to ask the question why, if Dr T and Mrs T thought Dr T and 'Tannerman' might be one and the same and that their info was overlooked by GNR why they didn't then take it upon themselves to contact the 'Find Madeleine' site or contact their local police when back in UK? One good reason they perhaps shied away from doing so was that they didn't want to get caught up in all the mania which I can understand.
Sometimes when minds are already firmly made up normal thought processes are not applicable.
SnipBILTON: Now what follows is the crucial part of the story. The police have told Panorama that the timeline, the chronology of the events of the night of May 3rd, are still at the heart of this investigation. They say that there are many inconsistencies in what the group who were having dinner with the McCaans the so-called 'tapas night' have said in their witness statements.
http://news.bbc.co.uk/1/hi/programmes/panorama/7106086.stmWhich leads to information not receiving the attention it deserves or being ignored in its entirety which seems to have happened in a huge way as far as Jane Tanner's witness statement was concerned.
Neither was it known in the public domain the extent to which potential evidence was being mistreated by the Judicial Police whose case it was until Ricardo Paiva testified to it in Amaral's libel trial in 2010.
Snip"Kate and Gerry have consistently known that potential fresh information was not being properly followed up, if at all.”
The potential new leads date from July 2008 when the case was officially shelved by Portuguese police after they failed to find any evidence of the missing girl.
The confidential dossier contains hundreds of statements that could prove useful in solving the mystery of Madeleine’s disappearance from an Algarve holiday apartment on May 3, 2007.
The McCanns’ legal team became aware of the file during court proceedings as part of a libel trial brought by the couple against the former detective, Goncalo Amaral, who led the initial investigation.
The McCanns’ Portuguese lawyer, Isabel Duarte, accused current Algarve police chief Ricardo Paiva of deliberately ignoring the leads because they did not fit in with the theory that Madeleine’s parents were involved in her disappearance.
Last month he appeared in court as a witness in support of former colleague Mr Amaral, who has written a book alleging that the girl died in the holiday apartment and her parents fabricated a tale of abduction after hiding her body.
"Every piece of information (in the dossier of potential new leads) was treated the same way - Ricardo Paiva writes on it 'this is not relevant to the investigation',
https://www.telegraph.co.uk/news/newstopics/madeleinemccann/7215353/Portuguese-police-ignored-Madeleine-McCann-leads.html