I've just bought a ticket for the 1st April AMM - LHR and its booked for an A321 and onto MAN on an A319. It's the same when I come back to AMM on 3rd May.
The strange thing about booking this flight is the fare structure:
AMM - LHR - AMM = £585
AMM - LHR - MAN - LHR - AMM = £415 which is what I've paid
What's the reason for this? The agent in the Indian call centre didn't know the reason when I booked the flight.