The survey of 285 Londoners was conducted by Bryter Research two weeks ago.
Read the full report, "Struck Out: Reforming London Underground's Strike Laws".
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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.