Well we never will know will we, unless there is something that can be had by FOI request.
I actually did read all you posted on low copy DNA, and with a lot of it I agree with you, but it's what they had to convict VT, plus his confession.
Which isn't good enough in my book.... They Low Copy DNA supported Nothing.... No Evidence was brought to trial to support Dr Vincent Tabak having committing this crime...
Anyone can make a confession... But you need hard facts and Evidence to support a confession...
If his confession fit the facts of Joanna Yeates date of Death... that apparently being the 17th December 2010??Then why was he charged between the 16th and the 19th December 2010 when he was at trial.....
The lack of body fluids and the obvious change of Joanna Yeates clothing is testament in itself that Dr Vincent Tabak didn't kill Joanna Yeates and these omissions were never challenged....
And to be factual.. Dr Vincent Tabak did not confess to anything... He did not confess to Brotherton"... and he did not confess to anyone else.. he sat at trial and told a tall story... that didn't support what had happened to Joanna Yeates...
It may have touched the edges to satisfy the prosecution... But if fell way short of being any kind of admittance to commiting this crime...
Edit... This is also why the understanding of whether or not both locks had been locked is so important... Because I believe they had to be both locked, or The Police would not have arrested CJ... because informing them only that he saw people on the drive wouldn't be enough... and I believe it was the fact that he had the keys to Joanna Yeates Flat , was the other side of the coin they need to arrest him...
So we would have the problem that the way in which Dr vincent Tabak left the flat locked being of massive importance....
If you think FOI will work in this case... try The Relocation Services, mrswah has done a topic on this... an interesting read....
FOI = Freedom of Information and only if we decide that it doesn't come under data protection... and as everything comes under data protection we can not help you any further with your inquiry...
There was a woman who tried to get information through FOI... They did the data protection on her too... I have posted on this matter ...
Edit... Here's the link to the FOI
https://www.whatdotheyknow.com/request/vincent_tabak_statements