DVD B&R 167: Diesel Hydraulics HeydayDVD B&R 167: Diesel Hydraulics Heyday 19. 75 The Western Region of BR adopted diesel hydraulic traction rather than diesel electric. Nearly 400 examples, both express, mixed traffic and shunting were introduced from the late 1950s. By 1977 they had all gone, save for a few preserved examples. We start with the original A1A A1A D600 Warship Class 41 and a short B&W sequence of D600 leaving Paddington with an express and then passing Par. A D6xx in