(13 Jun 2015, 11:40 am)Dan wrote New Sapphire ADL Enviro400 7536 making the same "hoover" noise associated with elderly Volvo B7TLs (a hell of a lot louder than GNE's 6021 which left Durham a few minutes after!)
But 7490 is a hell of a lot louder..!
Second day in a row I have been blessed with being within a few yards of that one and it deafening me...