I seem to remember the Chelsea and Westminster hospital do Hydrogen breath tests. For me if I could somehow get a referral to here, it would help verify my SIBO diagnosis from BioLab tests a couple of years ago. Would that be simple to do with a doctor? I really need to do this test through the NHS, as that in itself will help make SIBO more real to me and the people supporting me. It'll defintely help it be perceived as a genuine condition, rather than being a "quacky diagnosis". Also, if there are any hospitals in London which will do a hydrogen breath test based on symptoms and a simple referral through a doctor (rather than through a gastro), then please do let me know? Thanks.