1. A method of visibly tagging the position of items appearing in a moving image comprising the steps of: providing an identification device on or within each said item to be visibly tagged; capturing moving image footage which may contain the image of one or more of said items to be tagged using one or more image capture devices, said moving image footage comprising a plurality of successively captured moving image frames; determining the position of the image capture devices; determining the position of the identification device; determining the relative position of the image capture devices and the identification device and hence determining whether the item to be visibly tagged is in each of said plurality of successively captured moving image frames of the moving image footage and if so, determining the relative position of the item within each frame, and contemporaneously applying a visible tag to the determined position of the item within each of said plurality of successively captured moving image frames, wherein said step of contemporaneously applying a visible tag includes plotting a motion path of the determined position of the item within said successively captured moving image frames and automatically applying said tag to said motion path, wherein the position of the identification device is determined using tracking devices which are incorporated into the image capture devices or provided separately, and wherein the tracking devices are provided at fixed predetermined positions in or around the area where moving image footage is to be captured and wherein the identification device is operable to emit an RF signal that can be received by the tracking devices.