There is no argument anyway as you dont know whether it is likely or unlikely that they will check for a map. All i have said is it is possible they will if they suspect it is down to abuse and hes trying to get it under warrenty.
Its possible yes, In my opinion unlikely, im baseing that on the amount of people that have had warranty work carried out without any raised eyebrows on already mapped and modified cars. Also im just trying to give the guy a break and put his mind at rest. thats all.
Ive not had an MOT, how is that related?