- Ella is described as white, 5ft 7ins tall
- She was wearing blue jeans, a green coat and a jumper with Ugg boots
- Anyone with information should contact police immediately on 020 8345 2710
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The 90-year-old victim watched in horror from her bed as the thief climbed in through her bedroom window.
The remains of Sophie Lionnet, 21, were discovered in a garden at a house in Southfields, south-west London last year.
Port drugged and raped four young men and dumped their bodies near his home in Barking, east London.