Hi - really looking forward to this - Downton Abbey it certainly won't be, and sounds like it is more of the gritty realism that was The Village! It might make uncomfortable viewing for us now in the 21st century, but it is part of the history curriculum, so may be worth watching and editing before allowing smaller children to watch.
Especially looking forward to the plot, based on real life evidence, personal accounts and actual documents from Quarry Bank Mill, - sounds like they needed to have aired this over the winter, not over summer holidays when most people will be away - it is a great and essential part of our heritage.
We used to live near QBM, and have regular school and family trips there, it is an amazing building, owned now by the National Trust. Our own village, on the Cheshire/Derbys borders had 4 such large mill buildings, all with their own character, though many have been redeveloped etc. I don't think it will be as sanitised and unrealistic as Cranford, hoping for a good balance, with some Catherine Cookson thrown in for good measure!