Originally Posted by alfabits

Hello Dave, could you please elaborate on your comment? We are flying BCN->LHR->DFW later in Dec and I'm trying to figure out if a well-timed BinaxNOW test in Barcelona will be sufficient for both the UK and the US. We land in LHR the evening of the 25th and have a 9AM flight to DFW the following day but can spend the night at the airport (to remain airside) if needed. The guidance is confusing, to say the least.
Suggestions from others would also be much appreciated!