Following on from the recent thread re daylight MOT and lighting regulations I've done a bit of net trawling and found the original documentation.
  For the definitive answers please read this: 
The Road Vehicles Lighting Regulations - 1989  Takes a bit of reading but it's all there.  Andy (Rushjob) has been absolutely spot-on with his previous posts on the subject. 
 As has been previously discussed (at length!) a daylight only MOT means nothing from a legal standpoint as the bike would be in contravention of "The Road Vehicles Lighting Regulations - 1989". 
 Hope this will help dispel all the myths surrounding this subject. 
 Cheers, Neil. 
 [Edited on 3-9-2004 by neil748r]