The fire occurred on April 6.
Mayor of Newham Rokhsana Fiaz, said: “Tiffany’s parents are going through unimaginable pain at the loss of their much loved 15-year-old daughter who brought so much joy. I am deeply upset by this tragic loss of a young life, as is everyone in Newham.
"My thoughts and prayers are with Tiffany’s parents, family and friends at this very difficult and heart-breaking time. I am urging anyone with any information to contact the police incident room.
"Our priority is to support Tiffany’s parents grieving the loss of their child; and all those young people who have lost a dear friend.”
Call for information
Anyone with information should call the Incident room on 020 8345 3865, via 101 or Tweet @MetCC quoting reference CAD 5315/06Apr.
To remain 100% anonymous call the independent charity Crimestoppers on 0800 555 111.
See the previous statement from Mayor Fiaz and Councillor Amar Virdee