Pat Reynolds-Boehm
123 Meadow Road
Westminster Abbey
SW1A 1NXSynthetic test address · postcode allocation unverified
UK address format
Write recipient, optional unit, building number and street, any necessary dependent locality, town/locality, then postcode. International output adds UNITED KINGDOM on its final line. County is optional when town and postcode are present. A constituent-country filter is not a required postal county.
Single-line addressSynthetic format sample
TEST RECIPIENT, Flat 2, 12 Synthetic Lane, INVENTED LOCALITY, M1 2AB, UNITED KINGDOM
Multi-line addressSynthetic format sample
TEST RECIPIENT Flat 2 12 Synthetic Lane INVENTED LOCALITY M1 2AB UNITED KINGDOM
Synthetic format example only. Uppercase the postcode with one space before its three-character inward code. Outward codes have varying lengths. Town/locality is not a Royal Mail verified post town.
Coverage and sources
- England
- Westminster Abbey · SW1A
- England
- Manchester · M1
- Scotland
- Edinburgh · EH1
- Wales
- Cardiff · CF10
- Northern Ireland
- Belfast · BT1
The list above is the actual representative selection, not complete national coverage. Source-linked outward codes, locality and coordinates remain together. Unmapped records are excluded.
GeoNames source and attribution · CC BY 4.0
GB.zip provides outward codes, not allocated complete postcodes. Inward codes are synthesized. GB_full is not used. Code-Point Open excludes Northern Ireland; restricted ONS BT data is not included. Reference maps describe source areas, never synthetic buildings.
Testing and failure cases
Checkout forms
Illustrative test: normalize lowercase postcode input to uppercase with one space, leave county empty, and compare UI, copied values and submitted strings.
CRM round trips
Save and reload the postcode as a string without filling an empty county from stale data. Town/locality is not a verified post town.
Reproduction and recovery
Keep the seed, generation count, dataset and rule versions. Version changes may change samples. Empty selections clear results.
United Kingdom address generator FAQ
Are these postcodes allocated?
No allocation check is performed. Complete postcodes contain synthetic inward codes; no delivery or third-party acceptance is promised. Use a fake address for testing only, never to receive deliveries, issue real bills or prove an address. Synthetic results may coincidentally overlap real records.
Which countries are in scope?
England, Scotland, Wales and Northern Ireland, code GB. Excludes the Republic of Ireland, Crown Dependencies and overseas territories. See the actual coverage list and source versions above.
How do I reproduce a record?
Keep the same filter, seed, generation action count, dataset and rule version. JSON and CSV retain provenance and synthetic flags.