What is the difference between the Fit to Fly health certificate and the Covid-19 RT-PCR test, and where can I get them in London?

The Fit to Fly health certificate and the Covid-19 RT-PCR test are two distinct requirements for travelers. The Fit to Fly certificate is an assessment by a doctor confirming that a traveler is healthy enough to fly, while the RT-PCR test is a laboratory test to check for Covid-19. Travelers typically need to obtain both a Fit to Fly certificate and a RT-PCR test to comply with travel regulations. Recommended places in London for these services include Medicspot for both certificates and tests, and Assured Screening for RT-PCR testing, with online consultations available for the Fit to Fly certificate.