jane. totally agree that NHS advice does not take enough notice of the GI index- and the reasons why it is so important.
Old potatoes in their skins still have a lot more starch in them than new potatoes, in their skins or not. Basmati rice is not whole grain, but has a much lowr GI than risotto. 'Normal' pasta, when washed in cold water after cooking and quickly re-heated has also got much lower GI than if not washed. With whole-foods, you get more fibre, but not necessarily low GI- if I understand this right. The key is low STARCH- as starch will turn into sugar and into fat if unused and when insulin is unbalanced.