I have also inspected vehicles on behalf of the MVT, prior to their being registered. Also have registered vehicles with a MVT verification letter. The inspector still calls, all he is interested in, is physically checking the engine and chassis numbers and then he is off to the next one. What the club verifiction scheme does do, is to date the manufacture of the vehicle, from records on their database and/or evidence on the vehicle. Without this letter, you would have to go through hoops with the licensing office to get a date of manufacture accepted. So, the clubs verify the date and DVLA inspector checks vehicle has correct numbers.