Posting in AIBU for traffic!
I always keep my driving licence in my purse, but I've recently learnt that this is inadvisable because if you lose your driving licence, it contains enough personal information (name, address, date of birth etc) that it could be used to commit identity fraud if it fell into the wrong hands.
I had no idea, and nor did DH. Almost a million people apply for a replacement licence each year (not including licences replaced due to change of address etc), so it seems that there is quite low awareness of this issue.
In the UK, there's no requirement to produce your driving licence on demand (you have seven days to take it to a police station, if ever you're asked), so the safest place to keep your licence is at home.