You have absolutely no evidence that anyone in Julie's household had taken drugs that night.
Listen very carefully to what I am telling you, please do not try to suggest that the vast majority of Julie Mugfords co lodgers were not drug takers, who did not have any convictions for drug offences, because I have got a copy of all the lodgers Criminal records which formed part of the investigation when Jeremy was under surveillance. Of course, it could be possible that although where Mugford was staying and the other occupants were all convicted druggies, that not one of them took any drugs that night because they obviously knew that Jeremy was going to kill his family, and they would be required as witnesses about the timing of the call he made to Julie to back her story up because they all knew she was going to give evidence against him?