A bit of a career achievement yesterday - appearing as a guest on the BBC News channel. If you’re anything like me, then firstly sorry, but secondly you’re probably interested in the mechanics of how it actually works. First, I was sent a WhatsApp message from a journalist (at about 6.30pm my time). That probably means that she saw my contact page, where my phone number is; and while I don’t advertise WhatsApp as a way to contact me, of course it works. I didn’t see the WhatsApp messa...