Global321

Arrival / Departure from CMN in Feb...

Question about the middle flights. (Correct me if anything else is wrong.)

1. Arrival into CMN (USA to MAD to CMN)... need a PCR test within 48 hours of departure to CMN. I will be positioning from the USA, so I think I will be fine if I do the PCR test the day before departure in the USA, fly the redeye USA to Madrid and then continue (separate ticket) to CMN. Fill out health forms for Spain and Morocco.
2. Overnight near CMN.
3. CMN to MAD to LHR. I am a little unsure what testing I need before flying? Antigen morning of?
4. Overnight near LHR.
5. LHR to MIA. If I test the day before in CMN, I think I can use the same test to go to the USA.

So really, the question is... as a US citizen what test do I need before CMN to MAD to LHR flights with an overnight in the UK?

thanks in advance