P236 CEEFAX 236  Mon 17 Nov  21:35/45
  
    
  
 Knock, knock,                          
 Who's there?              
 Toby                      
 Toby who?                 
 Toby or not Toby that is   
 the question               
                            
 Knock, knock,              
 Who's there?              
 Justin                     
 Justin who?                
 Justin time for tea       
                            
 Knock, knock,              
 Who's there?         
 Frank                
 Frank who?                 
 Frankly I don't know      
     Thanks to Allison Pyman, Surrey    
       and Elizbbjth Chandler, Kent