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 (48, 48A) 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 (48, 48B) 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 (48, 48A, 48B), 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 (48, 48A, 48B) 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 (48, 48A, 48B) 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 (48, 48A) 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 (48, 48B) 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 (48, 48A, 48B), 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 (48, 48A, 48B) 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 (48, 48A, 48B) are arranged radially between the core engine casing and the core nacelle.