Paraffin Budgie...

Is the less than flattering name the North Sea Oil Workers (AKA Bears) gave the Helicopters that flew them out to the installations, Rigs & Boats that they worked on, and more importantly flew them home again.
This I reckon is a Eurocopter EC225 Super Puma clattering accross the sky enroute to Aberdeen airport to drop off a load of very happy workers going home after their stint offshore