After much trial and error testing specific cameras the following camera board was chosen based on its technical offering and price.
1/3inch 700TVL 960H High resolution SONY ICX811/810 CCD Sensor resolution up to 976 * 582(811)/976 * 494(810)Effio-E (CXD4140) DSP (CXD4140AGG)
The camera sensor has the IR filter removed to assist viewing in darkness. The lens size is 16mm and is mounted upon a 17mm lens mount to give greater range to focusing.
Control of the Infared camera settings is done via a cable.