Etihad are currently selling first class fares from Manchester while the A340-600 is used. I'm not sure what the uptake has been though given it is a limited period of operation.
I don't believe the A380 in the Etihad layout would be suitable for MAN based on the residence suite at the front, but, let's face it, stranger things have happened, and when it comes to the MEB3 at MAN, rationale often goes out of the window!
i am thoroughly impressed with MAN's performance of late though.
To think in 2016, we have the 'prestige*' routes of Los Angeles, Beijing, Shanghai, Hong Kong, Phuket, Mauritius and so on?
*when I say 'prestige' I mean the fact that 'West Coast USA', 'China', 'East Asia' are considered long term targets by many airports in Europe.