Many thanks to this forum. Travelling BKK to Dubai on 14 Feb and just checked manage booking. Flight changed to 777 and seats changed from 9EF. Not only to 3 seaters in the middle but my wife sitting in the row behind. When I tried to change seats there was no availability showing for 2 seaters. Telephoned Emirates and after first being told all the 2 seaters were booked and expressing my feelings 2A and 2B suddenly became unbooked.
I fully understand that there can be equipment changes, necessitating seat changes. But I would have at least exprcted to receive an email notification. How many customers having book months in advance suddenly find out at the airport that not only are they flying on a different aircraft but are separated from their companions. I used to have an app that told me of any flight changes. Unfortunately it was forced to stop.
Thanks again to everyone on this forum for keeping us up to date on all matters Emirates.