Cable theft causes Essex and Cambridgeshire rail delays
Rail services in Essex and Cambridgeshire have been severely disrupted after overhead power cables were stolen.
Network Rail said the theft affected other overhead lines, some of which came down in Essex late on Wednesday.
A train's windscreen was struck and some passengers had to be evacuated.
The Stansted Express and Broxbourne to Cambridge services have been suspended, National Express East Anglia said.
It said it did not expect trains to run until 13:00 BST.