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SW1Y 4JW
a defunct large user postcode in City of Westminster, Westminster
This postcode was deleted in December 1986.
The nearest currently active postcodes are:
St. James'S Square SW1Y 4LE
St. James'S Square SW1Y 4SJ
SW1Y 4AD
St. James'S Square SW1Y 4PD
St. James'S Square SW1Y 4JU
Duke of York Street SW1Y 6LA
Duke of York Street SW1Y 6JX
St. James'S Square SW1Y 4LB
Apple Tree Yard SW1Y 6AE
SW1Y 6AH