This is a non-geographic postcode so no map data is available.
The postcode It was introduced in May 2018 and terminated in June 2018.BN3 1GT is a small user postcode that may contain upto 100 addresses (but 15 is more typical).
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Postcode
Information about the postcode BN3 1GT
Introduction
May 2018
Termination
June 2018
User Type
Small User - may contain upto 100 addresses but 15 is more typical