. ive got a BA LHR-LIS arriving at 21:55 and I've booked a separate ticket for TP LIS-FAO at 23:05. Im HBO.

do i need to clear customs etc, or can i transfer airside and board my LIS-FAO flight without issues (assuming im not late etc) - the following says i need to do the following

https://www.ana.pt/en/lis/passenger-...ecting-flights
– If you are travelling only with cabin baggage, you have to go through the Customs corridor, head to the check-in or drop-off counter of the airline with which you will be flying next, and proceed as if you were boarding for the first time, having to go through security control all over again.