Originally Posted by
RichieMc
An Aer Lingus flight (and any other flight) with a BA number has always counted as a qualifying flight. That has not changed.
Correct.
Earning tier points is a fairly new development.
Correct but only with respect to EI primes. As above, if booked as a BA flight number then you have always earned TPs on EI and that has similarly not changed.
In essence, anything booked as a BA flight number is treated the same as a BA metal flight for earning and qualification purposes.