Originally Posted by
Beaulieu
My reading of it is that you do indeed end up with two PNRs, only that your Avios are refunded to your account and a manual reference put in...
That's certainly interesting. I really am struggling to see why BA are doing this since a 2-4-1 is supposed to be for one booking which starts and ends in the UK (or JER).
As noted perhaps it would be advantageous for TFC for LHR-HKG-LHR, but it definitely isn't for TFC for LHR-US-LHR.