I went into the office yesterday for the afternoon. The best thing about it was having a face to face 1:1 with my line manager, the rest I would have done more efficiently and comfortably from home. It was good to see how it felt as a try-out, but it was tiring and stressful in reality and I'm not rushing to go back in to work in the office any time soon. (I do have to go back and clear my desk next week though, because our office is the one that's designated as the initial flex desk area.)