Tingling in the hands and feet is often caused by a vitan B12 and or magnesium deficiency. Zinc might also be a factor. Tinnitus is also linked to zinc and B12 deficiency. Rashes might be from parasites or perhaps just from candida or food allergies(perhaps gluten intolerance?)

"Doctors here in the UK are not making the connection to mercury poisoning and are labeling me as having Chronic Fatigue (CFS). "

CFS, fibromyalgia, and multiple chemicle sensitivity could all be due to heavy metal poisoning or pesticide poisoning. Mercury is a major cause,

http://www.flcv.com/cfsfm.html

If you have good medical insurance, I suggest that you have your blood vitamin D level(25-hydroxyvitamin D) checked. I also suggest that you have your naural killer cell activity tested.
You may also want to have your iron levels checked, as well as your copper level. Other things to focus on are B12 and zinc. Methycobalamin(B12) injection help many ith CFS/mercury poisoning fight fatigue. It is poorly absorbed by some, but an alternative would be sublingual methylcobalamin(don't get cyanocobalamin).

A reaction to bread could be a gluten sensitivity, or perhaps a yeast allergy.

Blood in the urine might be a urinary tract infection, although those are much more common in women than in men. I guess it might also be caused by a vitamin K deficiency? Do you also get occasional nosebleeds? I used to get nosebleeds until I started taking a vitamin K1 supplement(I take 200 mcg a day). Blood in the urine might be caused by more serious things though. Mercury can damage the kidneys.

Do you have a sensitivity to garlic? Many who have mercury toxicity get candida overgrowth and parasites. Cloves and garlic are good at fighting both candida and parasites. It would be a good idea to go on a low carb diet, eliminating, sugar, alcohol, bread and other starchy foods, as well as fruit(replace it with vegetables).