Originally Posted by
corporate-wage-slave
But cabin luggage protocols are different, and can vary from 6 kgs to 23 kgs on different airlines. Plus Aer Lingus' regional services simply don't have space for big items on their smaller aircraft. So yes the general rule is that checked luggage broadly follows BA's logic, cabin luggage is more complex. But as I say so long as you don't overdo it, Aer Lingus are reasonably relaxed about this, particularly on Airbus services.
Not just their regional services. Last summer BA sent me on an adventure to SEA via DUB, due to a missed connection. The roller bag I had for in the cabin that fit fine in the A319/A320 from ZRH-LHR and LHR-DUB was too big to fit in the stow bin on the A330. Fortunately, just pulling a few things out and putting them in another stow bin helped. That was in J where there were a few empty stow bins. Y would have certainly been a different and less pleasant adventure.