Two people remain in a life-threatening condition after the attack on a train heading from Doncaster to King's Cross. Sky's Martin Brunt explains why the train didn't train stop. Read more of his analysis here: https://news.sky.com/story/police-rehearsed-a-knife-attack-scenario-on-a-train-line-in-march-heres-what-went-differently-this-time-13462585 SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews Follow us on Twitter: https://twitter.com/skynews Like us on Facebook: https://www.facebook.com/skynews Follow us on Instagram: https://www.instagram.com/skynews Follow us on TikTok: https://www.tiktok.com/@skynews For more content go to http://news.sky.com and download our apps: Apple https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8 Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB Sky News Daily podcast is available for free here: https://podfollow.com/skynewsdaily/ To enquire about licensing Sky News content, you can find more information here: https://news.sky.com/info/library-sales