Nice report.
I flew an A319 of British Airways last year and liked it. It was G-EUPV and we flew to Barcelona on it. Unfortunately, the return flight was on just a 737-400 G-DOCM.
This year, at Bologna, I watched our British Airways 737-400 G-BVNN landing from Gatwick. Within 15 minutes of landing, the aircraft was boarding for it’s return flight to London.