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                    | 
                        Title | 
                    
                        Test
                        Details
                        
                        
                            Pattern Title
                        
                     | 
                
                
                    | 
                        Expression | 
                    
                         
                            ^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$
                         
                     | 
                
                
                    | 
                        Description | 
                    
                         Matches UK postcodes according to the following rules
1. LN NLL     eg N1 1AA 
2. LLN NLL    eg SW4 0QL 
3. LNN NLL    eg M23 4PJ 
4. LLNN NLL  eg WS14 0JT 
5. LLNL NLL   eg SW1N 4TB 
6. LNL NLL     eg W1C 8LQ
Thanks to Simon Bell for informing me of LNL NLL rule for postcodes which I had omitted in an earlier version.
 
                     | 
                
                
                    | 
                        Matches | 
                    
                         G1 1AA | EH10 2QQ | SW1 1ZZ 
                     | 
                
                
                    | 
                        Non-Matches | 
                    
                         G111 1AA | X10 WW | DDD 5WW 
                     | 
                
                
                    | 
                        Author | 
                    
                        Rating:
                            
Not yet rated.
                        
                            Dave Sparks
                        
                     | 
                
            
        
    
        
        
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