I had an email as well very recently saying there had been a change (didnt say what the change was). On looking into further the flight depature time had changed by 5 minutes on one leg and also they had changed the aircraft on one lef from a A380 to a Q suite 777. Its fine by us and as its Doha back to LHR I guess its very likely to be either a A380 or a Q suite (unless anyone knows anything different!). Also our original flight on an A380 is still going at the same time from Doha so why they moved us onto a Q suite is not clear.