some rules are changing in may 2018. emmissions, but not seen anything about the obd port as yet
also mot is changing will be dangerous, major, or minor first two automatic fails minor replaces advisory's, the dangerous is for the benefit of the owner if they remove the car and are caught on the road they will get done for taking a vehicle on the road in a dangerous condition
manual advisories will be gone from the mot for the customer but will still be on the mot station copy, so no more sill covers fitted on your mot