First trip since pre-COVID days - a few days in Madrid next month.
MAN-LHR BA A321N
LHR-MAD BA A380
MAD-LHR IB A359
LHR-MAN BA EQV (A320 or A321N most likely).
All in business booked through Expedia, who booked through the Iberia engine which pretty much halved the price compared to a direct BA booking. And this for two airlines who are theoretically one.
There's the right way, the wrong way and the railway.