Thanks everyone, this is really helpful. I will probably just stick to Weetabix as I only have 1 as 1/2 a Heb so wouldn't work with the Ryvita anyway.
It would be good to know for sure about counting HE's as syns if you don't have the full amount. I sometimes have milk left over at the end of the day also, I would love to have porridge in the morning but I can't face the scan bran :yuk: to eat with it so usually don't bother!