This document provides information about researching ancestry and emigration from the UK to various parts of the world such as the USA, Canada, Australia, New Zealand, and India. It lists sources such as census records, parish registers, passenger lists, immigration records, and genealogical websites that can be used to trace immigrant ancestors who left the UK and settled in colonial territories or former colonies. Key events in immigration history are mentioned, like the use of Ellis Island in New York Harbor as a major port of entry for immigrants to America from 1892 to 1954.