Originally Posted by
corporate-wage-slave
BA will only see this as MEX-CPT, so the MEX ground agents won't be much interested in SEA but will be interested in you having fulfilled CPT's requirements. You don't need to do a UK PLF or do anything testing related for the UK, so that makes it easier on one level, but I would have a UK PLF completed just in case you are asked for it, it only takes a few minutes to do.
understood. I guess what I am trying to get at is that the PCR test I present to BA in MEX can be performed in SEA instead of MEX, right?
from what I read in the SA govt site is that the test must be taken within 72hr from origin departure (MEX). It doesn't state anywhere that the test must be taken in the same country at the origin departure.