My GP wants me to get some fairly standard blood tests as an overall health check but I'm shielding and so can't get a blood draw. She agreed that I could pay for some private tests where you get a finger-prick kit in the mail but she couldn't recommend a reputable company. She just suggested I google and choose a cheap one. But that seems a poor way to choose! I want tests with results that can be trusted. How can I tell which labs are good? Medichecks are prominent on the web. Any good?