British Nationality could be obtained through your birth, or through the birth of any one of your parents or grandparents, in St Lucia. This arises because of Britain's Colonial history.
To determine what form of British Nationality you might have, an analysis of your family's history must be done, and then applying it to the Nationality laws of St Lucia that were passed over the years.
STATUS OF ST LUCIA
Between 1814 and 31.12.1948, St Lucia fell within the Crown’s Dominions.
From 01.01.1949 until 28.02.1967, it was within the UK and Colonies as a colonial territory.
From 01.03.1967 until 21.02.1979, it was within the UK and Colonies as an associated state.
From 22.02.1979 until the present day, it was an independent Commonwealth country.
Click here for more information on the status of Citizen of the United Kingdom & Colonies (CUKC), a status achieved by birth in the Colony.