Welcome on-board DAF DB250 ELC Lowlander Y691 EBR (7441) which has a very nice turbo and an even nicer retarder. There is retarder screaming throughout the video however there are some epic loud bits at 0:32, 0:44 and 4:45
Everyone in east,north,south London can relate to this sound (Streatham, Brixton, Croydon,Wood Green,Walthamstow, Enfield, Edmonton and Tottenham were DAF DB250 hubs)