LIDAR Thomson scattering has been used very successfully on the JET Tokamak to measure the evolution of profiles of electron temperature and density. Profiles with a spatial resolution of ~12cm have been obtained throughout virtually all JET plasmas since the diagnostic installation was completed in mid-1987. The repetition rate of the system was enhanced from 1/2 to 4Hz in 1994 by installing a higher repetition rate ruby laser. In this paper we describe a new LIDAR system, built around the old laser, which exploits the principle of probing a sight line at an angle to the flux surfaces to gain higher effective spatial resolution, 2-3cm, in the edge and divertor plasma.