This makes it highly likely that Maddie's remains were transported from their first hiding place, possibly concealed in the sports bag, in the tail gate of the hire car!
Then, we have got a couple of clues to look at, one of which was (1) the empty tube of 'BAYGON' insecticide, found inside the derelict building and (2) the location of the shallow grave in the hollow of the derelict buildings back garden..
Did the grave digger, aka the abductor, killer, smother the remains of Maddie with all the contents of the insecticide from the 'BAYGON' tube, in an attempt to repell insects and microscopic organisms from devouring her flesh after her burial?
Is the missing sports holdall belonging to Gerry McCann currently buried beneath the disturbed ground of the shallow grave in the rear garden of the derelict building? I believe that it is highly probable that when the grave is e entually visited by the police and dug up, that the missing holdall will resurface again, containing the remains of Madeleine McCann..