I just watched all of this and was much impressed.
It could have been done differently,it could have been a Hollywood movie or it could be less fact based but I think the approach taken was the correct one.
The far left Russian apologists and the anti BBC Daily Mail readers seem to have formed a sort of Nazi-Soviet pact to slag off this production.
I will give no plot spoilers but having followed the real events in the news when it happened it seems like a fair account of what happened.
This is not a glamorous production.
The famous tourist attractions of Salisbury are not featured and Anne-Marie Duff should be praised for looking like a real women and not a model in this.