Hi all. Let me give a bit of background. I am an MFL teacher in my 2nd year, quite well known at my school for my busy outside school life, especially with travelling and attending music concerts. I really try and keep a good work-life balance and never let my outside school activities affect my job at all. My HOD has planned a French residential trip, originally scheduled for the 20-22 June. That has now had to be changed, and is being scheduled for the 25-27 June. Unfortunately I have planned to attend two concerts on the 25 and 26 June which I am deeply unwilling to miss. What is my stance here? Can I refuse to go on the residential trip? Any help would be greatly appreciated.