On my upcoming LHR I flight I had earlier today selected an exit-row seat 10A at OLCI when I noticed that this was available. Now accidentally I noticed that my seat was changed to a middle seat 11E (without informing me or anything).
Selected a new aisle seat now from the back of the bus (not too many seats available). Would have been really annoyed if I had ended up in the middle seat. AY IT is a total mess.