Eilish McColgan seeks a third Big Half title, returning to the London race she won in 2022 and 2024. Despite a toe injury, she finished seventh in the London Marathon.

David Weir aims for a fifth Big Half win, extending his record as the event's most successful athlete. He set a course record of 46:58 last year. Read more racing coverage.

The men's field includes Jack Rowe, who seeks a fourth straight Big Half title, and Zak Mahamed, making his debut after a 1:00:46 clocking in Barcelona. Related: Stormy Conditions See Record Shattering at Canadian Death Race.

This original Runner World brief is based on reporting from Athletics Weekly. Visit the source for its complete reporting, context and any later corrections.