J.M.
I let my baby decide when she was done nursing. She got to eat other food, and drink water with her solid meals, and if she wanted to nurse more she got to. As she stopped asking to nurse, I wound up just nursing her almost on a schedule... In the morning when she woke up, before nap time, and before bed time. She started refusing those nursing sessions when she was around 22 months, and I didn't try to force her to keep going.
So to me, baby led weaning means that you allow them to keep nursing until THEY choose to stop... rather than weaning them from the breast on purpose.