Fellow coeliac here!
Yes absolutely you'd be amazed the things gluten can be in and you need to make sure including asking specifically how they prepare things - do they use separate utensils / cooked seperate area / not fried in the same oil or fryer as gluten containing food. The risk is not just the ingredients themselves but also the cross contamination. Let them know also you are coeliac as opposed to an 'intolerance' it is different. Also with things that could or could not be gf you won't know if you aren't checking.
In general yes you do not need to buy specitically GF if no ingredients containing gluten in and in the UK they cannot hide them but check everything including drinks condiments (some salt!) etc for Barley, Wheat, Rye or Oats and any may contains or not suitable for statements. I don't tend to eat quinoa but would double check as feel like I have seen something about quinoa and lentils in themselves. Double check!
A protein called Avenin in Oats is very similar to gluten so some coeliacs cannot not have oats as react similarly. I am fine with Oats so do eat them (gluten free ones). BUT they must be specifically labelled Gluten Free Oats / gluten free oatcakes etc due to risk of cross contamination.
Yes absolutely you do. Coeliac works because your body starts to attack itself if having gluten. The autoimmune reaction is triggered the same even with tiny molecule i.e. less than a crumb so yes you do! You might not feel the reaction but it is still damaging you inside! This means all the measures you have said above. Seperate boards, toaster, utensils, washing hands thoroughly, not using same spreads / dips etc due to gluten crumbs etc. If eating at others then you bring your own or have a very clear discussion about the measures that need to be taken and you need to consider how much you trust them to do that. I would like to think anyone who cares for you and was making you a meal would want to ensure you are kept safe also. Be particularly mindful of cross contamination with buffets and gluteny fingers grabbing into everything.
I live by myself but eat i.e. at my parents who eat gluten. My view is yes you can but being really vigilant with cross contamination thorough hand washing, wiping down sides etc and possibly making yours / serving yours first to reduce risk of cross contamination.
As above I live by myself not really something I have experience with but I would say generally it is easier to do one thing gf if possible i.e. big pasta bake, meat and veg etc is easy enough. For other things do seperate!
Something I also need to follow up! I believe you should have check up bloods etc so definitely ask about this have you been able to speak with gastro/dietician specifically? I did have DEXA scans for bone density. check coeliac UK I bet there will be some guidance.
• Are there any good online shops for GF in the UK that you can recommend?
None specifically from me as I don't tend to but I know there are so do some research!
Not sure re. onset I was always very slim (🙄🤨) and tired but also have other health conditions, but main trigger for diagnosis was anemia and stomach pain quite suddenly. I had not long before though had a significant first flare of Vasculitis auto immune condition and I am curious if in any way linked?) But often was sick (i.e vomiting sick as opposed to sickly) as a child (now I wonder was it due to gluten?)!
Hope this helps 🙂