Eurostar train from London to Paris and Brussels has security, but it’s at the station not on the train. They don’t have this in the UK at least I’ve never seen it. Instead there seem to be de-facto areas where people put rubbish for the cleaners to clear up. They also seem to not be for terrorism but more to deal with drunk chavs. Trains home after football (soccer) matches too often too late for football fans too.”]
Source: https://gizmodo.com/amtrak-security-scares-you-silly-just-because-they-can-5635184