| For trackdays...
It's noise restricted and incredibly tight on the testing, every bike is tested and the circuits monitored at a few points (Quarry being one IIRC). They can be closed down on the day if the noise level is exceeded, so although they want you to get out and ride, they're very keen on the test.
e-markings are irrelevant, but a dB killer would probably help a lot.
As for MoT standard, I've seen many race bikes at trackdays there, and if they're at ACU spec, I can't see them being turned away. | 
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