Hunter 58
There is s slight difference. Eurostar will use a vast number of miles to slow down,
Not necessarily. In the case of a train derailment, unsecured bodies will fly like bullets. Even if one disregards Eurostar a local regional train derailing at 80mph is still potentially catastrophic.
Sadly, the UK has plenty of evidence of this from the past 20 years.
To be clear, I was only illustrating why lowcostdolly's comparison with ground travel (car) could be countered by someone 'if its so dangerous why don't trains have seat belts?'
My conclusion was that trains should have seat belts, not that infants should be unsecured.
FYI, I have rejected a take off from 55 knots in a light aircraft on a short runway. Not in the same leagure of brutality as a jet at 80knots, but still a sobering experience.