I'm flying to Heathrow from overseas (not red list country and I'm fully vaccinated). I want to get a PCR test done with the quickest turnaround time possible to minimise my isolation period. Has anyone got any recommendations? I obviously want a test done which will be accepted for the travel locator form. There is Concepto clinic in Heathrow but their website doesn't seem to have the most up to date information which is slightly worrying and I can't get through to them on the phone.