I went back at 9 months and pumped at work 2-3x initially while at work, then gradually reduced to 2x, 1x then stopped when we could introduce cows milk during the day and only breastfed morning and evening. It was a real pain and disruptive (even with my work being really well set up for it).
Thanks both!
I went back to work just after her first birthday. I pumped so she could have a bottle in the morning/during the day then she breastfed as soon as I got home from work. She's 2 now and no sign she's going to give up soon but she's also completely fine during the day without breastmilk if I'm at work.