Weĺl i binge watched it over 2nights and was thoroughly enthralled by it- the actors were all very good, but like other poster i too was confused by the different colouring of the sisters- i just assumed in the end(as no one had mentioned it) that perhaps they had different mothers & were actually half sisters?maybe its an explanation theyre saving if they bring out a 2nd series? I was also appalled by how they were treated but knew already some of this, its been well portrayed on 'Call the Midwife' set in same era and other shows and in history books etc, or even what our parents/grandparents have told us.Back in late 60's/early 70's my stepdad went to work building the motorways and we went too, lived in caravans- got to know all kinds of people, my mum had a lovely friend, a jamaican lady- her huge caravan was like a palace- and there were gypsy families too i was best friends with the youngest daughter- her nan had a true Romany wooden carved caravan.And our closest neighbours were an irish couple and other side an American & his welsh friend who worked together with my stepdad.Great folk all of them.Shame we never stayed in touch.