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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From Friday, Viagogo must publish the names and addresses of touts, those who sell more than 100 tickets a year via the site, to consumers.
Researchers at the Royal Botanic Gardens, Kew, have found that 75 of the world's 124 wild coffee species are under threat.
Molly Morgan fell to the ground, hitting her head and died in hospital the following day.