Commuters to London Liverpool Street endured delays this morning due to signalling problems.
The problems started at around 7.50am and currently 14 trains are cancelled, including services from Shenfield, Southend and Chelmsford with 51 others delayed.
Users took to Twitter to vent their frustrations.
Erin Jones, @erierijones, wrote: "Nothing I love more than paying @greateranglia £220 a month to be 20 minutes late to work. Nothing."
User "laulmagee", meanwhile, wrote: "@greateranglia another shocking service! As usual tut tut."
A Greater Anglia spokeswoman said: "There are signalling problems at London Liverpool Street this morning, at the moment it's causing delays of 20 minutes but we are working with Network Rail to restore normal service as quickly as possible.
"We apologise for any inconvenience caused."
