That's not the gist I got from my research, I'll try to find the link to the documents. Hopefully I'm remembering correctly, but I think the consensus was that the response would be proportionate, with attempts made to stop the situation getting more out of control. This would make sense, because NATO launching everything it has at Russia in response to a limited strike with few casualties would be completely disproportionate. Of course, the risk would be that NATO would fire a similar weapon back to show strength, at a similar target, and then things start to ramp up
@shreddednips
Very interesting response, thanks. I'd be interested to see the documents if you find the links.
Also to emphasise for anyone that is worrying - no one believes this is likely or imminent. It's only being discussed in relation to a programme, which also apparently concluded that the possibility is remote.