In June 2013, it was confirmed that Williams would henceforth compete for Great Britain, as was his right by dint of the right to British citizenship of Turks and Caicos Islanders.

[3] He joined the college after a Jamaican talent scout spotted his speed in a baseball game in his native Turks and Caicos.

[5] He cannot represent his native Turks and Caicos Islands, because they are not recognised by the International Olympic Committee, however, using a similar by-law to Anguillan long jumper Shara Proctor, Williams is eligible to represent Great Britain as Turks and Caicos are a British Overseas Territory.

Born and raised on Grand Turk Island to a Haitian mother, Williams moved to Jamaica in 2008.

Running for Munro College, he won the 100 and 200 metres at the 2012 Jamaican National High School Track and Field Championships, becoming the first non-national to do so.