Test According to NICE Guidlines in UK
This was spoted by someone else and may help you. I do not know how useful these tests are but they are the ones that should be available on the NHS in line with the Guidlines.
Investigations recommended by the UK National Institute of Clinical Excellence to exclude medical causes of chronic fatigue.
Tests that should usually be done:
urinalysis for protein, blood and glucose
full blood count
urea and electrolytes
erythrocyte sedimentation rate or plasma viscosity
random blood glucose
screening blood tests for gluten sensitivity
assessment of serum ferritin levels (children and young people only).
Additional serology tests that should only be done if the history suggests the possibility of a recent infection:
chronic bacterial infections, such as borreliosis
chronic viral infections, such as HIV or hepatitis B or C
acute viral infections, such as infectious mononucleosis (use heterophile antibody tests)
latent infections, such as toxoplasmosis, Epstein-Barr virus or cytomegalovirus.
The following link is quite interesting, just trying to digest it too:
see page 8
Hope this helps,