Telemetry is NOT installed in all royal mail vans. Our office vans have not got them and have no plans yet, you can tell a van with telemetry as it will have a magnetic login beside the ignition key in FIATS and beside the 12v power output on the Vauxhalls.
My van broke down once and the garage brought another van from a diff office which had it installed, i didnt know and hurried around the run as i was late and got a little lecture about it a few weeks later, was lucky nothing else happened over it, my dom had a sheet with everything i done that day eg braking conering etc Needless to say i have been in a few more telemetry vans since nad have been ok in them. lol