Any suggestions on where to go?
You might like to contact Genova Diagnostics, their headquarters might be in New Malden or somewhere like that, but you have blood taken at an address about 10 minutes by taxi from Marylebone Station. I need to check some of my old paperwork to give a full address.
Sometimes I watch a program called "The Curse of Oak Island", their goal is to find treasure, but are happy gathering data, pieces of the jigsaw. That's a bit like my journey, none of the bits of information would be considered essential by a doctor, but together they form a much better picture.