Jeremy was ringing the police at 3.26. Spending several minutes on hold. This was after spending several minutes looking for the phone number of a police station several miles away. So could not have phoned Julie at 3.30am.
After phoning the police, Jeremy would not have had time to phone Julie, get smartly dressed & arrive at WHF by 3.48am, driving slowly. None of the witnesses said the call was after 3.30am.
Jeremy phoned Julie at 3.00am. Cleaned himself up, then phoned the police.