Howard, re that tweet.
One of my daughters was at Uni in Norwich. A flatmate of hers was studying physiotherapy and during her placement in the local hospital kept seeing NfN written on patient notes but had no idea what it meant and couldn't find it in any of her lecture notes or books.
She eventually got over the fear of appearing stupid and asked a fellow student what it meant - Normal for Norfolk.
Just thought I'd add a bit of humour, Alex's posts need it