Originally Posted by
eightblack
Actually, you agreed to it as per the conditions of carriage (CoC), when you purchased your ticket...
5.5 Aircraft
5.5.1 We will try to provide the aircraft specified in our timetable (or specified to you at the time of issue of your Ticket) for your carriage, but cannot guarantee any particular aircraft will be used. We can change the aircraft on which you will be carried, whether for operational, safety, security reasons or otherwise.
Agreed eightblack, hence the end of my sentence says: "...that they can get away with.".