I'm a male manager in a school. Feeling undermined by another male colleague.
Behaviours include sending new ideas for department to principal asking her permission, and informing me via email after. Handing in work that had a long deadline last minute but it's clear v little time had been spent on it (can see this from document details), on numerous occasions.
Setting a competition for pupil, then only letting me know the day before that he was travelling a few hours away with pupil to take part in competition. Cover has been sorted etc prior to all of tgis. Organising a speaker to come in to speak to his class of pupils while I was off sick for a day. I find out through whole staff email.
Asking me to check and finish off work.