oh sorry, i see you are simply suggesting falsifying the creche records. Too complicated and really unlikely imo. Does R.Hall really make a case for such a thing in this doc, because the last one was terrible after a not bad showing in the first doc.
The general gist is this:-
Mr Hall has ascertained that the "photoshopped" last picture (the one beside the swimming pool) is honestly & truly not photoshopped. Its date-stamp. however, can be altered.
Mr Hall has decided that the weather conditions displayed in the last photo are not consistent with the records he has from Faro(?) airport weatherstation so it is necessary to alter the date of the last photo.
Mr Hall has decided that the photo must have been taken on Sun. 29th April due to those pictured not displaying any sign of a suntan.
Mr Hall has decided that all entries on the creche records for Madeleine after Sunday were falsified by a nanny as Madeleine did not actually attend the creche.
Mr Hall has decided that all those who reportedly saw Madeleine during the week either mistook her for Ella/didn't actually see her at all/were unreliable witnesses. (There were a few witnesses who were genuinely mistaken imo)
Mr Hall has decided that no independent witness whose statement is in the PJ files actually saw Madeleine after the Sunday so that is probably when she died.
Quite why the parents & their friends didn't wait until the following Saturday to report Madeleine missing & not mess up the last full day of their holiday is not touched upon.