R137 CMX is a Peugeot 406 BTP car. The livery is the same as all other BTP cars, with the siren mounted next to the police sign on the roof. Notice the registration is only a few numbers different from the BMW and Rover below
K343 FPU is a Ford Courier Van, based at York Station. They are the equivalent of panda cars, not high powered and quite small. This vehicle is based on the Ford Fiesta, many of which are pictured elsewhere on this site.
The same car from the rear.
K895 EYL
BTP
Leyland DAF
Located at York railway station
This is a Ford Iveco van with a trailer. Note the long side-on blue light on the trailer. It looks like the far side of it opens up to make a display or show. The van also has two blue lights to the rear as ‘repeaters’ because the main bar of blue lights is so high and so far from the front that it may be missed when viewed by a car behind.