Search for Single Top-Quark Production                                         
in e+e- Collisions with root(s) = 189 - 204 GeV at LEP                         
  
   The high luminosity delivered by LEP after the increase of the              
   electron-positron collison energy means that LEP2 is now providing          
   substantial data samples with which to make searches for new phenomena.     
   Based on the analysis of several hundred inverse picobarns of data          
   recorded at centre-of-mass energies between 189 GeV and 204 GeV with the    
   OPAL detector, a search for single top-quark production via flavour         
   changing neutral current has been performed. Limits for FCNC processes      
   predicted by extensions of the Standard Model are set. The search is        
   sensitive to both the hadronic and leptonic decay channels of the W boson   
   associated with the decay of the top quark.                                 
  
 Parallel session :11                  
 Plenary  session :7a