This vehicle is probably SXF 108, but there is no way of knowing. The chassis number puts it between 105 and 109 (with 107 in between), and 106 has now been found, but there's no way of knowing for sure. There is strong evidence to suggest that it was a Reconnaissance vehicle.
The present owner is trying to trace the original registration in the hope of getting it reunited with the vehicle, which is being restored.