Just thought that I'd register and bring up a few things that I don't think have been mentioned yet.
The media sources mention dark holdall bags being removed from the premises by the police on three occasions, the Thursday evening, before the body was removed on the Friday and after it was removed.
The Thursday bag was said by Sky to contain bedding, whereas there is no reference to either Friday bag containing anything. I think it is likely that there was only one bag on Friday, and one or other reporter got the chronology wrong.
The thing that bugged me when the police apologised was that they seemed to have some way of knowing for sure that the body was in the same place during both searches, yet they failed to uncover it during the first search. A likely scenario is that the object that contained Tia's body, e.g. the dark holdall, was spotted but not opened by an officer at the time, and hence the mistake was made. If she was in another container within the loft, such as the water tank, the only way they could have known for sure that the body was not moved is if they had SH and NS under observation the entire time, which we know is not true.
Another thing was that Basu blamed the procedures, rather than attributing blame towards the officer who failed to find Tia. This is speculation but do LE have different procedures for searching for missing persons who they believe are alive, and those they believe are deceased? If they first searched with the mindset that Tia was still alive, someone searching the loft could well have disregarded an object such as a holdall as a place that she could have been hidden.
I suspect that after their early enquiries suggested that perhaps Tia had not left the house, LE worked under the assumption that this was another Shannon Matthews. The family in this case was of a similar socio-economic status and similarly convoluted. I believe someone mentioned earlier that SH had 35 convictions? Perhaps some of those were for fraud, and given he seems to have lived in the area his entire life, it is likely that the local police would have been familiar with any convictions that he had.
Two things that led me to believe this were the following article:
http://www.guardian.co.uk/uk/2012/aug/09/tia-sharp-police-angered-shannon?newsfeed=true.
The most likely way that this would be "potentially damaging" would be if they believed that the comparisons were true, spooking the kidnappers and endangering Tia. The other thing, which I can't find the link for, was that at the press conference on the Wednesday after reinterviewing SH, the police said that they had a strong belief (or words to that affect) that Tia was still alive. By this point inconsistencies must have arisen in his story, yet they still had a strong belief, suggesting perhaps that they knew he was involved, but believed it was a kidnapping rather than murder, hence their earlier mistake.
I guess we'll find out in due course but this whole thing really bothered me, especially because the day that Tia was found was my sister's 12th birthday, and it all just seemed to hit too close to home.