Wow, cheers for that Neill, great insight.
On the way between Kiev and Pripyat our guide put a documentary on, there was a guy on there who was testing levels in Pripyat on the morning of 26th April. The levels were 15,000 times 'safe', He was in a full NBC suit, but children were just playing innocently around him in shorts and T-shirts. He told his superiors the levels, and yet they still denied the extent of the danger.
The guy, who must have been in his sixties, just broke down. He just had his head in his hands on the desk, just sobbing "I can't live with myself".