airside only vehicles are limited to electric tugs, belt loaders, high lifters and push back tugs, everything else, vans, cargo trucks, catering trucks and anything else you can think of has an MOT, number plate has tax and doesn't run on red diesel ! they are also subject to the same road laws that on airport that we have to abide with outside the airport with points on license etc, Vehicles cannot be over 10 years old unless specially modified for a specific job. Gives you an idea as to why Airlines don't self handle anymore !! its far to expensive..lol
Here oop norf you can stick anything airside as long as it's had a CAP 790 inspection by the airport authorities and permit granted. There's a ton of 'normal' vehicles airside here that aren't taxed, MOT'd or insured for normal road use, and run on red diesel (includes but not limited to normal cars, minibuses, vans, buses, coaches etc)