The driver killed in the Bedford train crash has been named as Shaun Burton, as his family say they are devastated by the loss.
British Transport Police (BTP) confirmed the 60-year-old died following the collision on Friday.
In a tribute, his family said: "We are devastated by his loss. Our thoughts are also with those affected by this incident."
BTP added its thoughts continued to be with the man's family and his colleagues at East Midlands Railway.
About 100 people were injured when two East Midlands Railway (EMR) services to London St Pancras collided at 17:15 BST.
Police said 28 people remained in hospital, including nine in a critical condition.
The Rail Accident Investigation Branch, which is working with British Transport Police to establish the circumstances of the crash, expects to provide an update in the coming days.
Trains have been disrupted since the incident, with EMR suspending services to and from London St Pancras over the weekend.
Thameslink has urged passengers to travel only if necessary.
Network Rail said the line between Bedford and Luton was expected to remain closed until 28 June while repair work and investigations continued.
Brett Byatt, who had been travelling to St Pancras from Bedford when the crash occurred, said other passengers "went flying into one another" after the collision.
He told BBC Breakfast he heard a "boom" followed by "shrieks and groans of pain" after the collision.
