Tests of the Standard Model and Constraints on                                 
New Physics from Measurements of Fermion-pair                                  
Production at 192-202 GeV at LEP                                               
  
        Cross-sections and angular distributions for hadronic and lepton pair  
        final states in e+e- collisions at centre-of-mass energies between     
        192 GeV and 202 GeV, measured with the OPAL detector at LEP, are       
        presented and compared with the predictions of the Standard Model.     
        The results are used to measure the energy dependence of the           
        electromagnetic coupling constant and to place limits on new physics   
        as described by four-fermion contact interactions. In the context of   
        models with a heavy Z' boson, limits are placed on the mass of the     
        Z' and the mixing angle between the Z' and the Z.                      
  
 Parallel session :5                   
 Plenary  session :6a