All lines are now open at St Neots after overnight repairs. There's disruption on First Capital Connect trains between Peterborough and King's Cross - buses will continue to supplement services between Peterborough and Biggleswade until 7am. Delays are also possible on East Coast trains.
More top news
Touts for unlicensed punt operators could soon be banned from parts of Cambridge.
A few wintry showers are possible during the evening, but most places clear with frost developing.
Firefighters say two people had a lucky escape after a blaze in their flat caused by a faulty fridge freezer.