How to avoid Aircraft swaps? A380 to 77W without First
Thai Airways are notoriously known for their frequent aircraft swaps.
I'm currently booked on TG910 BKK-LHR in First on January 7th next year. To my understanding they have a tendency to swap aircraft quite frequently, and the LHR and FRA routes are usually quite badly affected whereas the CDG route rarely seems to get its A380 swapped for a 777-300ER.
Since the travel is in the first week of January which is a popular travel period, are Thai less likely to substitute the A380 for a 777-300ER on the LHR route, or should I rebook myself to CDG just to be on the safe side? It's nearly a year out, so I understand that a lot can happen in that time.