as far as i am aware
fitting of the devices(known as telemetry) has been agreed nationaly with the C.W.U.
the devices provide information as to the vehicles whereabouts, its speed, excess acceleration and harsh braking.
there is not yet an enabling agreement to cover all the people issues around how the systems can be used although it does get a mention in the profesional drivers agreement in referance to drivers quarterly reviews, i think.
currently there is no agreement to switch on the equipment.
this kind of system has been in use in logistics/networks for some time
couldn't be a better time to do your job properly!
for up to date information contact
Bill Steel postal executive member overseeing the project