1. 1/2 penny: This was one of the most widely used postage stamps during the war, and featured the profile of King George VI facing to the left.
2. 1 penny: The 1 penny stamp also featured King George VI facing to the left and was used for domestic mail.
3. 2 1/2 penny: This stamp was introduced during the war and featured a portrait of Queen Elizabeth II. It was used for international mail.
4. 6 pence: The 6 pence stamp featured a portrait of King George VI and was used for heavier letters and packages.
In addition to these standard stamps, there were also special wartime issues, such as stamps commemorating the British victory in the Battle of Britain and stamps issued to support various war charities. The value of these stamps could vary based on their condition, rarity, and historical significance.