I was just talking to DH about this tonight. I feel that Ella is too young for me to stop bf and then restart with the new baby, I would feel guilty for not bf her. The only reason I wouldn't continue feeding her is because of what other people would have to say. If she weans off the breast and is happy off before the new baby arrives then fine, but if she shows an interest in starting feeding again when the baby arrives I will let her. She will still benefit from the goodness in breastmilk til she's at least 2.
Will take each day as it comes but after chatting with DH I can't see anything wrong with tandem feeding her especially if she's down to just a morning and evening feed then, I'm not ready to think about giving up and she really enjoys it.
So looks like I'll be investigating tandem feeding in a few months time!