A monitor mount apparatus for use in an operating theatre comprising: a mount attachable to an operating table, a support arm connected by a clamp assembly to the mount, the support arm extending along its longitudinal axis in a horizontal plane parallel to a plane of the operating table, a monitor mounting bracket connected by a friction assembly to a distal end of the support arm distal from the clamp assembly, and a display monitor adapted to display an image from an endoscope and fixedly supported by the monitor mounting bracket; wherein the friction assembly is adapted to permit under hand operation of a user: tilting of the monitor mounting bracket about a tilt axis parallel to the longitudinal axis of the support arm, and vertical movement of the monitor mounting bracket relative to the support arm; and wherein the friction assembly prevents said tilting and vertical movement under self weight of the display monitor and the monitor mounting bracket, and wherein the friction assembly comprises: a friction clamp stem adapted to frictionally engage with the distal end of the support arm, a radial arm fixed to the friction clamp stem and extending radially from the longitudinal axis of the support arm, a mounting bar fixed to the radial arm and extending spaced from and parallel to the longitudinal axis of the support arm, and a friction clamp mechanism (701,703) adapted to frictionally engage the monitor mounting bracket with the mounting bar; a clamp screw having a thread engaged in a threaded aperture of the mounting bracket, and a friction block mounted resiliently to the mounting bracket and engageable with a distal end of the clamp screw, wherein the friction block is adapted to frictionally engage the mounting bar between two bearing apertures of the monitor mounting bracket through which the mounting bar extends. a mount attachable to an operating table, a support arm connected by a clamp assembly to the mount, the support arm extending along its longitudinal axis in a horizontal plane parallel to a plane of the operating table, a monitor mounting bracket connected by a friction assembly to a distal end of the support arm distal from the clamp assembly, and a display monitor adapted to display an image from an endoscope and fixedly supported by the monitor mounting bracket; wherein the friction assembly is adapted to permit under hand operation of a user: tilting of the monitor mounting bracket about a tilt axis parallel to the longitudinal axis of the support arm, and vertical movement of the monitor mounting bracket relative to the support arm; and tilting of the monitor mounting bracket about a tilt axis parallel to the longitudinal axis of the support arm, and vertical movement of the monitor mounting bracket relative to the support arm; and wherein the friction assembly prevents said tilting and vertical movement under self weight of the display monitor and the monitor mounting bracket, and wherein the friction assembly comprises: a friction clamp stem adapted to frictionally engage with the distal end of the support arm, a radial arm fixed to the friction clamp stem and extending radially from the longitudinal axis of the support arm, a mounting bar fixed to the radial arm and extending spaced from and parallel to the longitudinal axis of the support arm, and a friction clamp mechanism (701,703) adapted to frictionally engage the monitor mounting bracket with the mounting bar; a clamp screw having a thread engaged in a threaded aperture of the mounting bracket, and a friction block mounted resiliently to the mounting bracket and engageable with a distal end of the clamp screw, wherein the friction block is adapted to frictionally engage the mounting bar between two bearing apertures of the monitor mounting bracket through which the mounting bar extends. a friction clamp stem adapted to frictionally engage with the distal end of the support arm, a radial arm fixed to the friction clamp stem and extending radially from the longitudinal axis of the support arm, a mounting bar fixed to the radial arm and extending spaced from and parallel to the longitudinal axis of the support arm, and a friction clamp mechanism (701,703) adapted to frictionally engage the monitor mounting bracket with the mounting bar; a clamp screw having a thread engaged in a threaded aperture of the mounting bracket, and a friction block mounted resiliently to the mounting bracket and engageable with a distal end of the clamp screw,