car went for its MOT today (failed sadly) but the reason i knew it failed is because i checked online on the .gov website. I also checked the MOT history for the vehicle and something kind of alarming popped to my attention in the history to do with the mileage. It goes up regularly in the old MOT's untill it changes drastically from 90,000's to 60,000's how can i check if the car has had a different engine? or is it more likely the mileage has been changed electronically? wouldnt that flag in an MOT test though? is there any plates i can check?