For UK readers who want to go the mainstream route here are the NICE guidelines as supplied by Ali in the comments after the Gluten and MS post.
This is part of her comment:
"I am sure you will be pleased to note that the care pathway now includes the referral to a gastroenterologist of those with negative tests but persisting coeliac symptoms."
Yes, too right. I'd personally still go LC as part of my gluten free approach but not everyone wants to go that way. I suppose I went gluten free without anything other than reading the literature! But being armed with the information you are positively coeliac is an opportunity to avoid so many auto immune diseases. If you need a positive test to make the change, these guidelines will help you.