[thenry]

"I go on trains quite often and they don't break between Bedford until you're approaching Luton and he started to gradually break and I thought, oh no," Brett Byatt told our correspondent Barnaby Papadopoulos.

"Then it was the huge impact and then... carnage emerged. It's one of those moments where everything is sort of suspended for a moment."

Then something "just switched" and Byatt went into first aid training mode, helping fellow passengers who were bleeding and had broken limbs.

https://news.sky.com/story/emergency...#liveblog-body

Gradually brake