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Nine people remain in critical condition following a fatal train crash in Bedford on Friday, police say
A train driver was killed and 100 people injured - of them, 28 remain in hospital
The 16:40 train from Corby collided with the 15:50 service from Nottingham - the events leading up to the crash
One passenger describes hearing a "boom" before "shrieks and groans of pain". Another says there was an "almighty impact"
In an update, Network Rail says there will be a "complex recovery operation" and no trains will be running between London St Pancras and Bedford this weekend
Transport Secretary Heidi Alexander says a "thorough investigation into how this collision happened" will be carried out
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Edited by Matt Spivey, with reporters at the scene in Bedfordshire
Bedfordshire Fire and Rescue Service has confirmed on social media that it is at the scene of the incident on the railway just south of Bedford.
"Please avoid the area," a spokesperson says.
A spokesperson for rail operator Thameslink is "strongly" urging people not to travel until later today.
"If you cannot delay your journey, please note that you will be severely delayed and will likely need to use an alternative route to reach your destination."
Replacement buses have been requested, they added.
Thameslink says all lines are blocked between Luton and Bedford due to a "problem under investigation"