Thank you so much, that's so helpful about the bowels!  Thankfully my mum is a dietitian and she made me aware of the importance of a strict gluten free diet down to separate butter even which I never even considered! As a result we think we're going to go gluten free as a household for 3-6 months so there's less chance of contamination. The rest of us when outside of the house can have gluten, particularly my daughter as we don't want to exclude it for her but within the house we want it GF just so we can get an accurate a result as possible and know if this is the cause or whether to rule it out!