One thing you learn about war, if you are close enough for it to touch you, is that it splits the atom. Situations and relationships that have grown over time and seem to have deep roots – a life in fact – can be blown apart in a day. Now, over two years on from the start of Vladimir Putin’s ‘special military operation’ (which came at a time when I was living in Rostov-on-Don, an hour or two from the Ukrainian border), I’m still in touch with several Russians I knew back then.