Hmmm, I think this might be complicated, or I am making it too complicated 
I return to work after mat leave in September on reduced hours. I have a fair bit of hols to use up so will need to book them in asap.
The 'normal' working hours for the business are 8.30am - 5.30pm (40 hours), before mat leave I worked 8am - 4/4.30pm Mon - Fri (36.5 hours I think), and when I return I'll be working Mon 8.30am - 1.30pm, a mix of 8.30am - 4pm/4.30pm/5.30pm Tue - Thur and Fri 8.30am - 1.30pm so 31.5 hours.
My question is, if I want to book a Monday or a Friday off, do I need to book a full day or just half a day? Ive been told I need to book a full day off, but it doesnt seem right that if my FT colleague wants a week off work they use up 5 days because they work 5 days, whereas if I want a week off work I have to use the same 5 days even though I technically only work for 4 of them in total
.
Work are explaining it away as because I have accrued my hols while contracted to do more hours than I will when I return, its not fair that I benefit from mor eholidays only having to book half days off. But my argument back is my hols will be reduced pro-rata anyway for the rest of the year and going forward in line with my new hours, and what I accrued previous is because of the hours I have already worked and is nothing to do with my hours going forward.
Help me!