I have made a number of attempts to check in for our MAM-LHR-SEA flight tomorrow. After adding number of bags etc, next page advises that I cannot check in because "We (BA) cannot verify your health documentation" I have added photo, passenger attestation and vaccination review to Verifly. i cannot seem to add my 1 day pre departure test results. Do you have to fully complete Verifly to book in or am I missing something on BA site.

Any guidance would be welcomed.

Thanks