The Kingdom of Great Britain is one of the four "original" factions in Pirates and Traders, along with the Dutch, French, and Spanish. In history, Great Britain was a major colonial power which once claimed a massive domain including holdings in what are now India, China, South Africa, Israel/Palestine, and the United States. They also had a sizeable foothold in the Caribbean, which is shown in Pirates and Traders.
As of the latest version the British start with control over 5 of 28 ports (~17.9%).
These ports are: