A spokesman for Southern trains said:
"Southern achieved improved scores in many of the categories, but we are disappointed that our overall satisfaction score hasn’t risen.
"We recognise that performance is a key driver to achieving passenger satisfaction and for much of the survey period, general railway infrastructure problems and a particularly difficult leaf fall season made it a particularly challenging period for us. We operate around 2,300 trains each weekday on one of the country’s most congested networks where knock-on effects from one small incident can cause major problems.
"We are analysing the results and will be working hard on a plan to improve in the areas where our passengers tell us we need to."
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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.