Will breastfeeding lead to weight loss?

I had a lovely approach recently from a media mum, Ashley Pearson, who had a baby in the month before Kate Middleton and wondered why she had not been turned into Posh Spice by four months of breastfeeding!
I replied back to Ashley that sadly the breastfeeding weight loss idea is a myth. After a few email exchanges, Ashley was inspired to do this great article.
The theory
I first looked into the e...