Occasionally, despite all the routines and stuff we go through to ensure we keep things secret, you make a mistake.
Some time ago I wrote a few WG's names and mobile numbers on a scrap of paper, intending to take it to work with me for reference. Something distracted me and I ended up leaving it on my desk at home
. I was the other side of Manchester when I realised
Fortunately, when I got home it was still where I left it - generally nobody goes in there anyway - but it was one scary moment. I don't write things down now.
What's the closest you've come to making that fatal error?