A gas turbine engine comprising an accessory gearbox assembly comprising an accessory gearbox and a plurality of accessories arranged to be driven by the accessory gearbox , the accessory gearbox comprising a gear train and an accessory gearbox casing enclosing the gears of the gear train , each accessory is driven by a shaft , a first plurality of accessories are secured to a first side of the accessory gearbox casing , the shafts of the first plurality of accessories are parallel, the shaft of each accessory of the first plurality of accessories has a spur gear , the shaft of a first accessory of the first plurality of accessories has a bevel gear , a second plurality of accessories are secured to a second opposite side of the accessory gearbox casing , the shafts of the second plurality of accessories are parallel, the shaft of each accessory of the second plurality of accessories has a spur gear , the shaft of a second accessory of the second plurality of accessories has a bevel gear , the gear train comprises the spur gears of the accessories , the bevel gear of the first accessory is arranged to mesh with a further bevel gear and the bevel gear of the second accessory is arranged to mesh with the further bevel gear , the shafts of the accessories are arranged in a V-shape, and the further bevel gear is arranged to drive the accessory gearbox assembly , wherein the further bevel gear is arranged on the radially outer end of a radial drive shaft, characterised in that the axis of the drive shaft 72A, 72B, 72 of each accessory 48 intersects the vertical plane Z containing the axis 11 of the gas turbine engine 10 and the radial drive shaft 38, and the accessory gearbox casing is mounted on a core engine casing of the gas turbine engine , a core nacelle is arranged around the core engine casing , the accessory gearbox and the plurality of accessories are arranged radially between the core engine casing and the core nacelle . a first plurality of accessories are secured to a first side of the accessory gearbox casing , the shafts of the first plurality of accessories are parallel, the shaft of each accessory of the first plurality of accessories has a spur gear , the shaft of a first accessory of the first plurality of accessories has a bevel gear , a second plurality of accessories are secured to a second opposite side of the accessory gearbox casing , the shafts of the second plurality of accessories are parallel, the shaft of each accessory of the second plurality of accessories has a spur gear , the shaft of a second accessory of the second plurality of accessories has a bevel gear , the gear train comprises the spur gears of the accessories , the bevel gear of the first accessory is arranged to mesh with a further bevel gear and the bevel gear of the second accessory is arranged to mesh with the further bevel gear , the shafts of the accessories are arranged in a V-shape, and the further bevel gear is arranged to drive the accessory gearbox assembly , wherein the further bevel gear is arranged on the radially outer end of a radial drive shaft, characterised in that the axis of the drive shaft 72A, 72B, 72 of each accessory 48 intersects the vertical plane Z containing the axis 11 of the gas turbine engine 10 and the radial drive shaft 38, and the accessory gearbox casing is mounted on a core engine casing of the gas turbine engine , a core nacelle is arranged around the core engine casing , the accessory gearbox and the plurality of accessories are arranged radially between the core engine casing and the core nacelle . <EOS>