Originally Posted by
SK AAR
Add it during OLCI. I did it last year for my BA Avios number (although I didn't receive points)
I don't think you can use your BA Executive Club account. I think you need to use a Vueling Club or IB account.
You can link all these accounts and then you can transfer your points from IB or Vueling to BAEC later.
I'm not sure why it needs to be so complicated but unfortunately, it is...