Organisers of the London Marathon say the event will be split into two races held on two separate days next year, effectively doubling the number of participants. Multiple outlets report that the planned “double format” will increase capacity to welcome 100,000 runners in total across the two days. The change is presented as a way to manage growth and accommodate more entrants than in previous single-day editions. While the reporting describes the overall structure of running the marathon across two dates, it does not provide additional details on how the courses or start times will be arranged, nor does it specify how the field will be divided between the two races. The outlets consistently describe the same headline elements: a two-day format and an overall target of 100,000 runners. The reports also indicate the approach is intended to preserve the event’s “unique” character while expanding participation.