London Marathon Road Closures 2024 Dates. Roads will be closed across the city for the 2024 london marathon which is set to start today (sunday, april 21). To achieve a smoother flow conducting the marathon and to minimize inconvenience to the citizens, a few roads will be temporarily closed.

The marathon only takes place on one day, but it’s such a big event that some road closures (and parking restrictions) usually start a day or two prior, and continue into the. Spur road, constitution hill, horse guards road and birdcage walk eastbound have been closed since friday.