Well, Simon ...... what's there to say, really?
Let's put it this way:
Although I'm no particular fan of Corbyn's- and most certainly NOT a Labour Party supporter,
- I do admire his "stance" if, indeed, he did what he did for the right reason(s) ... which, as I understood, was to draw attention to the problem of overcrowding on ALL Rail Companies' cross~border, long-distance trains.