"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."
There's disruption on Southern Trains between Victoria and Sutton, and between London Bridge and Wimbledon due to an earlier lineside fire at Mitcham Eastfields. Tickets are being accepted on London Buses and Tramlink services.