I am not so big in thories myself, better in intuition and observing my symptoms.
And in my case, candida started in my inner ear to then become systemic ....
I too think like Shroom that some other viruses - bacterias are involved and they act in concert. As per candida I would think (again intuitively unlike Shroom who has quite a few experiments to prove what he says) so I would think candida is a vehicule to help overcome mercury intoxication.
Cant wait to hear about the result you will get from UK. Keep us posted.