(18 Sep 2015, 3:53 pm)Jimmi wrote That will probably be because the rear screens are likely to be programmed to only show the service number on the rear screens.
Yes - rear display switch setting will be set to 2 (32x17) instead of 3 (128x17). New vehicles come set as 0/1/2; whilst, as a temporary solution, one can set the switch setting of the rear display on the destination controller, this is over-written when the programme is loaded again.
Realistically, Arriva should also have a fifth display set up - sign 4 - given that their refurbished Sapphire vehicles have 144x19s on the back (which use sign 0 as per the front, meaning that the number is on the wrong side of the display).