UK postcode Rule

Hi All,

I tried to write a a rule for UK postcode validation by using Match Pattern .when I test it giving right answers.

but this match pattern passing just first half postcode (AA9)  also pass.

when I bind it to the postcode column it passing all the patterns except Just Numbers(12345,123456,7896-----fail) in that field.

it gives score 9.99.

Did anyone came across this problem,

please help me out or please can anyone share if they wrote the rule for this already.

Regards

Kumarr