Union Flag Definitive

United Kingdom · 2001 · 1st Class

This definitive stamp features the Union Flag, the national flag of the United Kingdom. The design is a simple yet powerful representation of the nation, with the flag appearing to wave against a plain white background. It is a non-denominated stamp, marked '1st' to indicate its validity for first-class domestic postage.

Issued at the beginning of the 21st century, this design replaced the long-running Machin series for the standard 1st class letter rate, offering a more explicit national symbol for everyday postage.