It’s even starting get short videos on Instagram about the running issue in Euston
www.instagram.com
Comments show that people fear not getting their seat reservation, including comments about reservations often being cancelled so you have to be quick, and the lack of luggage space.
So in effect, the rush is unavoidable because people are
always going to fight to be first. If they were allowed on the platform earlier, there would still be a scrum to get on - although it would be spread out more.
This tells me the service needs to be reliable enough that seat reservations are protected and enforced, and as for luggage - well that's a bigger problem. I did say before that one way to solve that is to introduce restrictions or charges for extra large or multiple bags, but that wouldn't be popular and would also need enforcement.
IC services all over the country will have similar issues with boarding and Euston is clearly worse because of its layout, but solving the problem isn't clear cut.