Police are trying to trace a cyclist who was filmed apparently taking property from a car parked on a driveway in Sutton.
He was captured on a security camera outside the owner's house. The cyclist apparently tested the door handle to find the car was unlocked before opening the boot.
A Tom Tom sat nav and a pair of sunglasses were reported stolen. It happened on Sunday morning at about 5:50am.
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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.