Suzanne Ratajova who was punched repeatedly in the head and knocked unconscious in Herne Hill last year appealed for the public's help to find who did it. She said: "I don't want any one to go through what I had to go through."
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She had been kept in solitary confinement and chained to hospital bed, according to her husband Richard.
The idea is to encourage people to use the open spaces like parks and waterways more.
18 year-old Kane Johnson went missing on April the 10th and his body was discovered near Lambeth Bridge eleven days later.