I have had a look on the 5:2 website, it says not to do it if your breastfeeding.
my ds is 16 months and my milk is not his main source of nutrition, we feed after work, before bed, 10pm once or twice in the night and about 6am so still quite a lot but they are usually short feeds.
in this case would I be ok to start 5:2? I thought by breastfeeding mothers they probably meant those feeding a young baby?