A new study by the Trade Unions Congress has found in the capital, 6,500 young people aged between 18 and 24 have been out of work for more than 12 months.
Total youth unemployment has risen by 58% since the year 2000.
We've been speaking to Londoners Alex Kouam, Sophia Kichou and Claudette Shay from Centrepoint Parliament, who have struggled to find work.
More top news
"All it takes is for somebody to see me - and I could just die, just like that. I could want to go to the shop and not come home."
Before the killing, Peters searched the internet for "serial killers", "treatment of child killers in prison" and "premeditated murder".
Arriva Rail North, Greater Anglia and South Western Railway are all affected.