Fonsini
There's an interesting interview clip in the Guy Martin Channel 4 programme on the Vulcan which may answer your question.
A Vulcan nav(?) talks about many years later meeting a Russian woman, talking to her for a while then asking where she was from - it turned out she was from his target city. He admits to being so shocked that he had to walk away.
He also speaks about spending time memorising target details from intel (presumably satellite photos) so that they knew their targets incredibly well.
Pontius may be able to elaborate.