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I am trying to find the regex to use in a bot flow that validates a UK postcode entered.

Using 'M15 4FN' as an example, when I speak it, the bot hears 'M15 four FN' and passing that through the below regex fails validation.

\b[a-z]{1,2}[0-9]{1,2}[0-9]{1}[a-z]{2}\b

Does anyone have the correct regex we should be using?

Hello Tim, 

The issues is that speech to text analytics transcripts 4 as four. Your regex pattern needs to accept both numeric digits and their word equivalents. 

Option A - Simple for single digits

^[a-zA-Z]{1,2}d{1,2}s?(zero|one|two|three|four|five|six|seven|eight|nine|d)s?[a-zA-Z]{2}$

Option B - More comprehensive UK post code regex with case insensitivity

(?i)^[a-z]{1,2}[0-9]{1,2}s?([0-9]|zero|one|two|three|four|five|six|seven|eight|nine|ten)s?[a-z]{2}$

Cheers, 

I am trying to find the regex to use in a bot flow that validates a UK postcode entered.

Using 'M15 4FN' as an example, when I speak it, the bot hears 'M15 four FN' and passing that through the below regex fails validation.

\b[a-z]{1,2}[0-9]{1,2}[0-9]{1}[a-z]{2}\b

Does anyone have the correct regex we should be using?

I am trying to find the regex to use in a bot flow that validates a UK postcode entered.

Using 'M15 4FN' as an example, when I speak it, the bot hears 'M15 four FN' and passing that through the below regex fails validation.

\b[a-z]{1,2}[0-9]{1,2}[0-9]{1}[a-z]{2}\b

Does anyone have the correct regex we should be using?