A recent comment by Oiler made me think about punching holes in the back plate. With a new bike the MOT is a distant thought but if you keep it, the holes would fail the test according to this:
Technically a hole down the middle would also fail it but maybe give it more chance of it getting through. Remember these are visual checks and not noise ones. Depends on the tester of course. If I had holes in the back I'd probably make up 2 plates and stick them on just for the test. What they don't see, they don't know about!
The daft thing is, you could have an aftermarket pipe as loud as hell that passed with an advisory but a fail for a much quieter holed pipe that did not comply with the visual check! Best way would be to ak a tester if the holes would fail the bike, before taking it in for a test.
What a game eh!