W1U postcode district

Postcodes and sectors

1,070 of the district's 1,521 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 51.51870, -0.15348, which locates the district, not a building.

Companies registered in W1U

Companies House lists 6,315 companies with a registered office in W1U; 4,149 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for W1U

• City of Westminster
• Greater London
• London

Roads filed under W1U

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Aldburgh Mews
• Ashland Place
• Aybrook Street
• Baker's Mews
• Baker Street
• Barrett Street
• Bentinck Mews
• Bickenhall Street
• Bingham Place
• Bird Street
• Blandford Street
• Bourne Mews
• Broadstone Place
• Bulstrode Place
• Bulstrode Street
• Chiltern Street
• Clay Street
• Cramer Street
• Cross Keys Close
• David Mews
• Dorset Street
• Duke's Mews
• Durweston Mews
• Edwards Mews
• Garbutt Place
• Gees Court
• George Street
• Gloucester Place
• Gloucester Place Mews
• Gray's Yard
• Grotto Passage
• Hinde Mews
• Hinde Street
• Jacob's Well Mews
• James Street
• Jason Court
• Kendall Place
• Kenrick Place
• Loxton Walk
• Luxborough Street
• Manchester Mews
• Manchester Square
• Manchester Street
• Mandeville Place
• Marylebone High Street
• Marylebone Lane
• Montagu Mansions
• Montagu Row
• Moxon Street
• Nottingham Place
• Nottingham Street
• Oldbury Place
• Ossington Buildings
• Paddington Street
• Picton Place
• Porter Street
• Robert Adam Street
• Rodmarton Street
• Sherlock Mews
• Spanish Place

Check an address in W1U

Check an address in W1U

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=W1U" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about W1U

What does a W1U postcode tell you?

That the address lies in the W1U district of the W (West London) postcode area, and the place OS Open Names most often lists first for its postcodes is City of Westminster. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,070 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest W1U

• W1G0.4 km
• W1H0.5 km
• W1C0.6 km
• W1K0.9 km
• W1W0.9 km
• W1B1.0 km
• W1S1.1 km
• W1T1.2 km
• W1F1.3 km
• W1J1.3 km
• WC1E1.5 km
• W1D1.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids