Let's put aside, for a moment, whether or not we believe that Jeremy received a call from his father. We KNOW he called West and we KNOW West called Bonnet. There appears to have been a very minor, but totally understandable discrepancy regarding Sheila's status.
Sadly, this minor discrepancy has been used to suggest that ANOTHER call was made to the police, not by JEREMY Bamber but by NEVILLE Bamber, but it was decided -at PC level!!!!!- to keep this call from Jeremy against the time that they MIGHT wish to frame him for the murders.
Perhaps then, it was West and Bonnet who gave permission for a training exercise to be carried out at the scene. Perhaps it was they who gave permission to attend to Special Branch, Drug Squad, IRA, KGB, the policeman's chorus from Pirates of Penzance and Uncle Tom Cobbley et al. It was of no moment that in their enthusiasm for their work we are told they wounded a (living?) body, lost a (living?) body, moved (living AND deceased) bodies, killed a (living?) body, took any number of pictures of (deceased AND living) bodies in indescribable poses, waved banners from the roof and peed on the property, generally having themselves a ball because, at the end of the day, a PC and civilian worker had decided between them to withhold the one piece of evidence which would have cleared Jeremy's name!!!!.
If ANYONE can provide me with a concise, logical and believable answer to the simple question "WHY?" I'm all ears. Until then, NONE of the above makes an iota of sense.