The line is probably the worst in london in the morning. There are signal failures every week or two for 2 to 3 days. These so called minor delays mean when you wait for a tube you cannot get on as it is full of heathrow passengers arriving. This is there main access route and what does it say about london infastructure. How will it cope with increased passengers with the expansion. Investment in stock is needed now.
Some days passengers are waiting half an hour to board a train which is completely unnavceptable