Well, if you link it to the engine check light, it will go on when you turn the key then off when you start the car, i can't see how it would make the car not pass the Mot.

Cos the lights dont go off at the same time, making things like this easy to spot.
So, your happy to disable the entire airbag system, then hide the fact?
Rather than illegaly butcher your speedo and invalidate your insurance, why not just fit dummy airbags (resistors) where the seats should be to keep everything else happy.
How / where to find those resistors?
Could save me TONS of work.
Fiend, well, DON'T buy cars from Modena, or at least the used ones from dealers, all of them have kinda double of the Kms they have on the tacho.
Aaand... if you'd read well be-fò to shot stoopid sentencies you'd read this car is my toy, not my daily driver, so who cares if i'll have to find a "slimey" way to pass the MOT, insurance would not be invalidated in any case, we have "renounce to driver's liability" here, you pay kinda 80 euros more every year, if yer tires are worn / wrong measure / slick tires and you crash in another car insurance doesn't care about it and pays the same, same story for coilovers, exhaust and stupid airbags, also because here in Banana Republic ANY modify you do to your car is ILLEGAL, there's no way to make it legal, so who gives a shit, just hide it as good as you can and enjoy.
I say stupid airbags just cos's i gonna fit 4 point seatbelts and bucket seats, son an airbag is gonna worth nothin on that car.
