Sinéad Ryan: Hoarding make-up is a risky business, so the ever-pristine Miriam O’Callaghan might be on to something

As a rule, I don’t wear make-up unless I’m working. And I don’t mean in the box room that serves as my working-from-home space, because that would be weird, but rather “on show” in the actual office with actual real people, or on telly or – sometimes – the radio.