Russ
My 2p worth...
I have a daytime MOT which was passed with full track kit on, no mirrors and no indicators and no headlight. I needed a brake light, reflector and horn for it to pass acording to the tester.
My theory is that as long as your bike looks presentable and you don't ride like a tosser and if you do get pulled don't be abusive then you should be ok. Mine has been like this for 3 years now and I have had no issues, even riding in some heavily policed areas (North Wales etc).
If a copper wants to do you, it really doesn't matter whther you have the daytime MOT or not imho.
Lily
[Edited on 1-1-2006 by JPM]