Originally Posted by Cerebrito

To come back to this, the British Airways check in agent at Heathrow T5 couldn't have been more helpful. The flight was for my mother in law. As she had an extra suitcase (in addition to the one included on her ticket), and both suitcases were overweight, she offered a business class upgrade for the LHR-MAD leg, for £108, which included two suitcases at 32KG all the way through to Guayaquil.