Which one is your relative? Once I know I can supply more information.
I am guessing it was Robert Hancock.
According to the Police report, he was found dead at the scene - and taken to Manor Park Cemetery ARP Mortuary (a temporary site). His address was stated to be 5 Washington Avenue E12. His aged was stated to be 45
Many of those who were injured were taken to Aldersbrook Hospital, though some were also taken to East Ham Memorial Hospital in Shrewsbury Road.
Robert Hancock's next door neighbour, Edwin Herbert Hull (Number 7 Washington Avenue), aged 70, was injured in the leg, in 1944, in another (non-related) bomb raid.