I am looking to put in a flexible working request to change my office work days. I currently do Tuesday and Thursday and the other 3 days in the office and I would like to change to Tuesday and Friday. There is no one else in the office on a Friday but it would work better for me especially as the commute is quieter. On Thursdays there are only a few people in the office anyways and most of my meetings are online. So the only thing they can say I will miss out on is the slight more socialisation (most of the office is in on Tuesday). Are they able to reject it on this basis?