It looks like both Helene and Mel, in a busy environment, made decisions based on misunderstandings, possibly due to communication from the production team, who also perhaps misunderstood what was going on. (I'm thinking one camera with one of them, one with the other, and camera teams saying where people are and where they'd meet, while Mel and Helene also said where each is, and where they'd meet, and everyone chivvying everyone else as the train pulled in.)
But what was striking was Helene's level of worry about Mel, and Mel's insistence that she'd proved she was ok. I think she's had a hard time since leaving the limelight and her mum is feeling protective towards her. Her lack of belief in herself has made me catch my breath quite often. I mean, she is a talented intelligent woman worth listening to. But she doesn't see that.