London has the best levels of good health among its population, according to the census - at 84%, compared with 81% nationally.
The city also has relatively few people whose daily activities are limited because of disabilities or health problems - with the London borough of Wandsworth bottom of the list for all local authorities.
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"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.