on the submission of a vehicle for an examination the applicant does not, after being requested to do so, produce the registration book issued under the Road Vehicles (Registration and Licencing) Regulations 1971 relating to the vehicle, or other evidence, acceptable to the examiner, inspector F13or nominated tester, as the case may be or Secretary of State, of the date of the vehicle's first use or manufacture and the chassis or serial number given to the vehicle by its manufacturer and, if the manufacturer has also given the vehicle an identification number, that number also;

the vehicle or any part thereof or any of its equipment is so dirty as to make it unreasonably difficult for the examination to be carried out in accordance with the provisions of these Regulations;

the examiner or inspector F14or nominated tester, as the case may be is not able with the facilities and apparatus available to him at the place at which the examination would otherwise be carried out to complete the examination without the vehicle being driven and the vehicle is not when submitted for examination, either for want of fuel or oil or for any other reason, fit to be driven to such extent as may be necessary for the purposes of the carrying out of the examination;

before the carrying out of an examination of a motor vehicle any things which are on the vehicle, and are not part of its equipment or accessories, are required by the examiner or inspector F15or nominated tester, as the case may be to be removed from the vehicle or to be secured in such manner as he may think necessary and the things are not removed or secured accordingly; F1...

in a case where the fee for the examination is payable in advance of the examination the examiner, or inspector F16or nominated tester, as the case may be, F4... is not satisfied that the fee payable for the examination has been paid as required by Regulation 20(2)(a) or (b)(i); F5...

the vehicle emits substantial quantities of avoidable smoke;

a proper examination of the vehicle cannot readily be carried out as a consequence of any door, tailgate, boot lid, engine cover, fuel cap or other device designed to be capable of being readily opened, being locked or otherwise fixed so that it cannot be readily opened; F8...

in the case of a vehicle propelled by a compression ignition engine, to which regulation 61(10BA) of the Construction and Use Regulations applies, the exhaust system has been so altered that the examiner or inspector F19or nominated tester, as the case may be is not able, with the facilities and apparatus available to him at the place at which the examination would otherwise be carried out, to determine whether Part II of Schedule 7B to those Regulations applies to the vehicle;