Thanks to the excellent advice on here I have booked an Ex Dub Flight in business to Lim. This will give me my BA Silver so I'm very grateful. In addition the company who are dealing with my travel arrangement in Peru have booked a number of economy internal flights with LAN. I have the PNR but don't seem to be able to book seats or put my BAEC No into the booking. Can anyone advise please. Also my understanding is that these flights won't earn tier points and will only receive 25% Avios. Is this correct? Thanks for your help.