Yes but they are not as crowded as stations - especially if there's a hiccup in the schedules; cf [1] and [2] [1] https://news.sky.com/story/thousands-of-train

Yes but they are not as crowded as stations - especially if there's a hiccup in the schedules; cf [1] and [2] [1] https://news.sky.com/story/thousands-of-train-passengers-stranded-as-all-lines-blocked-at-london-euston-11780331 https://news.sky.com/story/thousands-of-train-passengers-str... [2] https://london.web2ua.com/london-is-crippled-by-commuter-chaos-as-overcrowding-closes-kings-cross-after-thousands-of-rail-passengers-are-daily-mail-1894/ https://london.web2ua.com/london-is-crippled-by-commuter-cha...