Thanks, MarlyWings. I'm sure we'll hear more about this during the trial (ie another attending police officer or two who will attest they didn't dissuade GBC from helping). This will directly contradict what GBC told Wendy - a clear-cut example of dishonesty/deception that will cast a pall on many other pieces of evidence.
With regards to discussion about whether Nigelaine and OW knew from the outset, I honestly believe that while they "knew" (in terms of strongly suspected) and while GBC "knew" that they knew, that discussion ("I did this - help me") probably never took place. Ever. Seems like the sort of family in which everyone intuitively "knew" what needed to be done from here on in, and perhaps they could justify to themselves under the umbrella of "protecting the girls". MOO.