On Wednesday, 24 October, an Olympic medal and blazer were reported as stolen from a venue in Mayfair, central London.
It is believed the items were taken between 00.00 and 05.00 on Wednesday, 24 October.
Westminster officers are investigating.
There has been no arrest. The property remains outstanding.
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The film had formed part of a commemoration to the Choucair family, three generations of whom died in the fire.
John Nolan, who was found with cigarettes and two lighters, suffered burns on 65% of his body after being alight for around six minutes.
Known as Pily she died in January, seven months after the disaster, having suffered a stroke.