Commuters were stuck on trains for up to two hours on Wednesday on another day of rush-hour travel misery in London.
Delays, diversions and cancellations caused chaos to South West Trains (SWT) services, which were hit by signal failures at Surbiton in south west London and at Waterloo station.
One packed train was so full that passengers were forced to stand in the toilet. Platforms at Surbiton and Woking were over-crowded.
Passenger Lucy Vose said she left her house at 6.30am and was still nowhere near work after 9am.