Network Rail has said it expects to be fined about £70m - a record figure - for delays suffered by passengers.
The Office of Rail Regulation (ORR) is expected to impose the penalty later this year.
http://www.bbc.co.uk/news/uk-26807389
Network Rail, which maintains Britain's tracks and rail infrastructure, said it was disappointed passengers had not seen the punctuality it had promised.
It said work was continuing to make the network more reliable - but congestion and extreme weather had caused delays.