Josh Fenton-Glynn will run the 26.2 miles through the capital in memory of his brother, Alex English, who died in January 2025 from a rare cancer.
Argentina has long claimed sovereignty over the Falkland Islands and invaded them in 1982 before being defeated in a short but bloody war.
The North Ayrshire Community Champion Awards, in association with Aspris, are now underway at the Waterside Hotel in West Kilbride.
The Sinn Fein vice president delivered the keynote address on the first evening of the Sinn Fein Ard Fheis in Belfast.