Rex
BA shorthaul have been doing DME (and before that SVO) day trips since well before Easyjet was a glint in Stelios' mind.
It is a recent BA change from a short haul route to long haul that has seen the Club World product deployed on the ex BMed/BMI A321's and B777 and B744 aircraft on the route.
Hell, I remember doing an SVO return back in 1990 for BA on a B737-200 @ M0.72 with no area navigation system (*) and having to track NDB's all the way through Russia. The return sector with strong headwinds is in my logbook at 5 hrs 14.
Just saying!
(*) we had area nav using auto dme/dme tuning but there weren't any/enough at any time to give any reliable accuracy