The postcode of London has two parts. The first part begins with a letter, depending on the location in London. The following figures depend on the name of the area, and the second part of the London postal code consists of one number and two letters, depending on the specific street name:

The London postal code starting with W stands for West London; ;

The London postal code starting with WC represents the middle and west of London; ;

The postal code of London starting with SW stands for southwest London;

The postal code of London beginning with SE stands for southeast London;

The postal code of London starting with NW represents northwest London; ;

The London postal code starting with n stands for North London; ;

The London postal code starting with e stands for East London; ;

The post code of London with EC stands for East Central London, that is, the City of London.

For example, if you want to write a letter to Holmes who lives in Baker Street, the postal code of Holmes' home in London is NW 1 6XE, where NW 1 means that Holmes lives in northwest London.