Hang on, sorry I think I told you incorrect information. I thought you meant the oaty cereal bars. Do you mean the oat cereal?
You can have 30g of the oatibix bites cranberry/original.
I can't find the biscuit ones on the HEb list, they are the ones you have I think if they are the same as Weetabix. The bitesize cranberry is 30g and the flakes are 28g as a HEb.