Martyn Sadler, 38, died in the major incident at Bicester Motion - a former RAF base - alongside firefighter Jennie Logan, 30, and businessman David Chester, 57, last Thursday.
Thames Valley Police confirmed enquiries are ongoing into the cause of the blaze, however it is not safe to enter the former RAF base due to 'fire hotspots'.
A major crime team at Thames Valley Police has launched an investigation into the Bicester fire at a heritage car centre after the 'unexplained' deaths of two firefighters and a member of the public.
Oxfordshire Fire and Rescue Service's chief fire officer choked with emotion and appeared to be fighting back tears as he told 'with a heavy heart' of the 'unwavering bravery' of his colleagues.
Officers want to speak with the despot's bald-headed doppelganger after man exposed himself days before Christmas to a number of people at The White Hart in Bicester, Oxfordshire.