I've spoken to my line manager informally before submitting a flexible working request. He has agreed to my reduction in hours, 0.5 days per week and I also asked if I could work from home one day a week (or even one day a fortnight). He said I could do my job from home, no issues there but would probably not allow it because it would set a precedent for others to ask to work from home. I feel this is unfair. Is this a valid reason? I'd like this to be able to pick dd up earlier than 6pm on this day but he said I'd have to give him a better reason than saving time travelling to work that day.