Correct me if I'm wrong but isn't there a window of opportunity available for the extra service that starts on 1st August. According to Airline Route First Class will be scrapped the following January. So if it's true then there is a chance of 'use it or loose it' for 5 months.
Dubai – Birmingham eff 01JAN16 EK041/042 2-class 777-300ER replaces 3-class -300ER (Previously Airline Route did not specify this flight will be served by 3-class aircraft, in the report filed on 22DEC14)