I've just watched it on catch up and also really enjoyed it.
I liked the going into detail about Hugh and Helen's life together. Like some other people, I also wondered if Helen had a breakdown, perhaps severe Post Natal Depression or was ill following complications from childbirth. It would certainly explain why only the baby had been taken away from her siblings.
It was quite amazing that, when she came out of Central Station, nobody shouted out "Awright, Lulu, hen! Gonnae gie's a song?" And she ditched the tinted reading glasses after realising there was no sun to block out in Glasgow.
Sarah