motor tractor definition { a mechanically propelled vehicle which is not constructed itself to take a load other than the following articles ,that is to say water fuel accumulators and other equipment used for the purpose of propulsion loose tools and loose equipment, and the weight of which does not exceed 7370 kgs) ie daimler ferret, brdm2 weigh about 7000kg so should be ok, para 11.1 agricultural machine u quote has nothing to do with motor tractor mot exemption category . hope this helps