Re: password manager, but they are more likely to use pen and paper
@Mage
You are almost there, but I downvoted ... because sensitive accounts (HMRC, banks) should be kept in two separate physical locations if they need be recorded somewhere else than one's brain.
Also, the jacket phone thing .... women will keep phone and diary in their handbag ... then again, handbag snatchers are usually after money and ID, so they grab ID/Passport/Driver's license, any cash and the credit/debit card(s), search for papers stored in same location as cards for pin's ...I doubt they would go through the diary for online account passwords ... not their business model, yet ...