well,
I've just received my Progressive Preschool (trade) magazine and found this product inside.
It's a breastfeeding vest from a mum business, which looks really good and is not too expensive (the normal vest is £13.99 which is okay for a top like this)
it's a two layer vest that covers your tummy when you're feeding, and the top layer lifts up like a teeshirt/vest top.
and it's really long