Primary school. Younger TA working in my year group - when the pupils found out her first name and decided to use that instead of Miss 'surname' she didn't correct them. When I queried it, she said she was more than happy for them to call her by her first name. This has grown from a few pupils to most of the pupils in school. Some pupils know my first name and tried it with me, but I corrected them to my surname.
Is this a now accepted thing in other schools as I'm wondering if I'm just old fashioned and behind with the times?!